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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

18123+0154 A 2260 AB (HD 166823)

18^h 12^m 18.16^s +01° 53' 50.8" P.A. 107.00 sep 1.9 mag 8.56,11.70 Sp G5 dist. 60.39 pc (196.99 l.y.)

Coord 2000	18123+0154	Discov num	A 2260	Comp	AB	Coord arcsec 2000	18 12 18.16 +01 53 50.8
Date first	1910	Date last	2021	Obs	20
Pa first	117	Pa last	106.5	P.A. Now (θ)	106.5°
Sep first	2.5	Sep last	1.95	Sep. Now (ρ)	1.95"
Mag pri	8.56	Mag sec	11.70	delta mag (ΔM)	3.14	Spectral class	G5 (yellow)
Pri motion ra	+000	Sec motion ra	-002
Pri motion dec	-037	Sec motion dec	-040
Notes

rPM=0.09 (< 0.3, Physical double)

This double is physical.

18123+0154 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 166823	123240	18 12 18 +01 53 51	A 2260 AB	2021	20	107	1.9	8.56	11.70	3.14		<===
Show		123240	18 12 18 +01 53 51	RAO 66 AC	2012	3	72	17.2	8.56	15.90	7.34

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 166823	Constellation	Ophiuchus	SAO	123240	HIP	89207
Tycho2	0435-01944-1	Gaia DR2	4276093186784192896	HD	166823	BD	BD+01 3620
Distance	60.39	Distance ly	196.99

WDS 18123+0154 A 2260 AB (HD 166823) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
A__1895	Ma -	Aitken, R.G.	1895PASP....7..305A
A__1895		PASP 7, 305, 1895 (most data also in A__1914d)	1914PLicO..12....1A
A__1896a	Ma -	Aitken, R.G.	1896AJ.....17...27A
A__1896a		AJ 17, 27, 1896 (most data also in A__1914d)	1914PLicO..12....1A
A__1896b	Ma -	Aitken, R.G.	1896AN....142...77A
A__1896b		AN 142, 77, 1896 (all data also in A__1896a)	1896AJ.....17...27A
A__1896c	Ma -	Aitken, R.G.	1896PASP....8..286A
A__1896c		PASP 8, 286, 1896
A__1896d	Ma -	Aitken, R.G.	1896PASP....8..314A
A__1896d		PASP 8, 314, 1896 (all data also in A__1896a)	1896AJ.....17...27A
A__1897a	Ma -	Aitken, R.G.	1897AN....142..161A
A__1897a		AN 142, 161, 1897 (all data also in A__1896a)	1896AJ.....17...27A
A__1897b	Ma -	Aitken, R.G.	1897AJ.....17...76A
A__1897b		AJ 17, 76, 1897 (all data also in A__1914d)	1914PLicO..12....1A
A__1897c	Ma -	Aitken, R.G.	1897AJ.....18...56A
A__1897c		AJ 18, 56, 1897 (all data also in A__1914d)	1914PLicO..12....1A
A__1897d	Ma j	Aitken, R.G.	1897AN....145..129A
A__1897d		AN 145, 129, 1897 (most data also in A__1914d)	1914PLicO..12....1A
A__1898a	Ma -	Aitken, R.G.	1898AJ.....18..128A
A__1898a		AJ 18, 128, 1898 (all data also in other refs)
A__1898b	Ma j	Aitken, R.G.	1898AJ.....18..161A
A__1898b		AJ 18, 161, 1898 (most data also in other refs)
A__1898b		(erratum AJ 18, 180, 1898)	1898AJ.....18..180A
A__1899	Ma -	Aitken, R.G.	1899PASP...11..128A
A__1899		PASP 11, 128, 1899
A__1899b	Ma j	Aitken, R.G.	1899AN....150..113A
A__1899b		AN 150, 113, 1899
A__1900a	Ma -	Aitken, R.G.	1900AN....152..161A
A__1900a		AN 152, 161, 1900
A__1900b	Ma -	Aitken, R.G.	1900AN....153..369A
A__1900b		AN 153, 369, 1900
A__1900c	Ma -	Aitken, R.G.	1900PASP...12..127A
A__1900c		PASP 12, 127, 1900 (all data also in A__1900b)	1900AN....153..369A
A__1900d	Ma j	Aitken, R.G.	1900AN....152..209A
A__1900d		AN 152, 209, 1900
A__1900e	orb -	Aitken, R.G.	1900PASP...12..103A
A__1900e		PASP 12, 103, 1900
A__1900f	orb -	Aitken, R.G.	1900PASP...12..240A
A__1900f		PASP 12, 240, 1900
A__1900g	Ma j	Aitken, R.G.	1900PASP...12..203A
A__1900g		PASP 12, 203, 1900
A__1901a	Ma j	Aitken, R.G.	1901LicOB...1...14A
A__1901a		Lick Obs. Bull. 1, 14, 1901
A__1901b	Ma j	Aitken, R.G.	1901LicOB...1...66A
A__1901b		Lick Obs. Bull. 1, 66, 1901
A__1901c	orb -	Aitken, R.G.	1901PA......9...57A
A__1901c		Popular Astron. 9, 57, 1901
A__1901d	Ma -	Aitken, R.G.	1901AN....156..321A
A__1901d		AN 156, 321, 1901 (all data also in A__1901a)	1901LicOB...1...14A
A__1901e	Ma -	Aitken, R.G.	1901PASP...13..161A
A__1901e		PASP 13, 161, 1901 (all data also in other refs)
A__1902a	Ma j	Aitken, R.G.	1902LicOB...1..129A
A__1902a		Lick Obs. Bull. 1, 129, 1902
A__1902b	orb -	Aitken, R.G.	1902LicOB...1..190A
A__1902b		Lick Obs. Bull. 1, 190, 1902
A__1902c	orb -	Aitken, R.G.	1902PA.....10..486A
A__1902c		Popular Astron. 10, 486, 1902
A__1902d	orb -	Aitken, R.G.	1902PASP...14..153A
A__1902d		PASP 14, 153, 1902
A__1902e	Ma -	Aitken, R.G.	1902AN....158..245A
A__1902e		AN 158, 245, 1902 (all data also in A__1902a)	1902LicOB...1..129A
A__1903	Ma j	Aitken, R.G.	1903LicOB...2...16A
A__1903		Lick Obs. Bull. 2, 16, 1903
A__1903b	Ma -	Aitken, R.G.	1903LicOB...2...55A
A__1903b	+orb	Lick Obs. Bull. 2, 55, 1903 (all data also in other refs)
A__1903c	orb -	Aitken, R.G.	1903PA.....11...28A
A__1903c		Popular Astron. 11, 28, 1903
A__1904a	Ma j	Aitken, R.G.	1904LicOB...2..139A
A__1904a		Lick Obs. Bull. 2, 139, 1904
A__1904b	Ma -	Aitken, R.G.	1904LicOB...3....6A
A__1904b		Lick Obs. Bull. 3, 6, 1904
A__1904c	Ma -	Aitken, R.G.	1904LicOB...3...61A
A__1904c		Lick Obs. Bull. 3, 61, 1904
A__1905a	Ma -	Aitken, R.G.	1905LicOB...3...88A
A__1905a	+orb	Lick Obs. Bull. 3, 88, 1905 (all data also in other refs)
A__1905b	Ma -	Aitken, R.G.	1905LicOB...3...90A
A__1905b		Lick Obs. Bull. 3, 90, 1905 (all data also in other refs)
A__1905c	orb -	Aitken, R.G.	1905LicOB...3..147A
A__1905c		Lick Obs. Bull. 3, 147, 1905 (all data also in other refs)
A__1905d	orb -	Aitken, R.G.	1905LicOB...3..169A
A__1905d		Lick Obs. Bull. 3, 169, 1905 (orbit catalog)
A__1905e	orb -	Aitken, R.G.	1905PA.....13..190A
A__1905e		Popular Astron. 13, 190, 1905
A__1906a	Ma -	Aitken, R.G.	1906LicOB...4....4A
A__1906a		Lick Obs. Bull. 4, 4, 1906
A__1906B	Ma -	Aitken, R.G.	1906MmRAS..56....1L
A__1906B	+orb	cited by Lewis (MemRAS 56, 1, 1906)
A__1906c	orb -	Aitken, R.G.	1906LicOB...4...75A
A__1906c		Lick Obs. Bull. 4, 75, 1906
A__1906D	Ma -	Aitken, R.G.	1906QB821.B972.....
A__1906D		cited in BDS (Burnham Double Star Cat.), 1906
A__1907a	Ma -	Aitken, R.G.	1907LicOB...4..101A
A__1907a		Lick Obs. Bull. 4, 101, 1907
A__1907b	Ma -	Aitken, R.G.	1907LicOB...4..125A
A__1907b		Lick Obs. Bull. 4, 124, 1907
A__1907c	orb -	Aitken, R.G.	1907LicOB...4..107A
A__1907c		Lick Obs. Bull. 4, 107, 1907 (all data also in other refs)
A__1907d	Ma -	Aitken, R.G.	1907LicOB...4..170A
A__1907d		Lick Obs. Bull. 4, 170, 1907 (all data also in other refs)
A__1907e	orb -	Aitken, R.G.	1907AN....174..217A
A__1907e		AN 174, 217, 1907
A__1907f	Ma -	Aitken, R.G.	1907AN....176..323A
A__1907f		AN 176, 323, 1907 (all data also in other refs)
A__1908a	Ma -	Aitken, R.G.	1908LicOB...4..166A
A__1908a		Lick Obs. Bull. 4, 166, 1908
A__1908b	Ma -	Aitken, R.G.	1908LicOB...5...28A
A__1908b		Lick Obs. Bull. 5, 28, 1908
A__1908c	Ma -	Aitken, R.G.	1908LicOB...5...55A
A__1908c		Lick Obs. Bull. 5, 55, 1908
A__1908d	Ma -	Aitken, R.G.	1908LicOB...5...43A
A__1908d	+orb	Lick Obs. Bull. 5, 43, 1908 (all data also in other refs)
A__1908e	Ma -	Aitken, R.G.	1908PASP...20..185A
A__1908e		PASP 20, 185, 1908 (all data also in other refs)
A__1908f	orb -	Aitken, R.G.	1908PASP...20..267A
A__1908f		PASP 20, 267, 1908
A__1908g	Ma -	Aitken, R.G.	1908PASP...20..290A
A__1908g		PASP 20, 290, 1908 (all data also in other refs)
A__1908h	Ma -	Aitken, R.G.	1908PASP...20..291A
A__1908h		PASP 20, 291, 1908
A__1909a	Ma -	Aitken, R.G.	1909LicOB...5..115A
A__1909a		Lick Obs. Bull. 5, 115, 1909
A__1909b	Ma -	Aitken, R.G.	1909LicOB...5..166A
A__1909b		Lick Obs. Bull. 5, 166, 1909
A__1909c	orb -	Aitken, R.G.	1909PASP...21...83A
A__1909c		PASP 21, 83, 1909
A__1910a	Ma -	Aitken, R.G.	1910LicOB...6...62A
A__1910a		Lick Obs. Bull. 6, 62, 1910
A__1910b	Ma -	Aitken, R.G.	1910LicOB...6...70A
A__1910b		Lick Obs. Bull. 6, 70, 1910
A__1910c	-	Aitken, R.G.	1910LicOB...6....1A
A__1910c		Lick Obs. Bull. 6, 1, 1910 (no data)
A__1910d	Ma -	Aitken, R.G.	1910PASP...22...95A
A__1910d		PASP 22, 95, 1910 (all data also in other refs)
A__1910e	-	Aitken, R.G.	1910PASP...22..137A
A__1910e		PASP 22, 137, 1910 (no data)
A__1910f	Ma -	Aitken, R.G.	1910PASP...22..140A
A__1910f		PASP 22, 140, 1910 (all data also in other refs)
A__1911	Ma -	Aitken, R.G.	1911LicOB...6..163A
A__1911		Lick Obs. Bull. 6, 163, 1911
A__1911b	Ma -	Aitken, R.G.	1911PASP...23..238A
A__1911b		PASP 23, 238, 1911 (all data also in other refs)
A__1912	Ma -	Aitken, R.G.	1912LicOB...7...93A
A__1912		Lick Obs. Bull. 7, 93, 1912
A__1912b	-	Aitken, R.G.	1912LicOB...2....3A
A__1912b		Lick Obs. Bull. 7, 3, 1912 (no data)
A__1912c	-	Aitken, R.G.	1912PASP...24..126A
A__1912c		PASP 24, 126, 1912 (no data)
A__1912d	orb -	Aitken, R.G.	1912PASP...24..165A
A__1912d		PASP 24, 165, 1912
A__1912e	orb -	Aitken, R.G.	1912PASP...24..216A
A__1912e		PASP 24, 216, 1912
A__1912f	Ma -	Aitken, R.G.	1912PASP...24..228A
A__1912f		PASP 24, 228, 1912 (all data also in other refs)
A__1912g	Ma -	Aitken, R.G.	1912PA.....20..643A
A__1912g		Popular Astron. 20, 643, 1912 (all data also in other refs)
A__1913	Ma -	Aitken, R.G.	1913LicOB...7..186A
A__1913		Lick Obs. Bull. 7, 186, 1913
A__1913b	Ma -	Aitken, R.G.	1913PASP...25...41A
A__1913b	+orb	PASP 25, 41, 1913 (all data also in other refs)
A__1914a	Ma -	Aitken, R.G.	1914LicOB...8...52A
A__1914a		Lick Obs. Bull. 8, 52, 1914
A__1914b	Ma -	Aitken, R.G.	1914LicOB...8...93A
A__1914b		Lick Obs. Bull. 8, 93, 1914
A__1914c	Ma -	Aitken, R.G.	1914LicOB...8...96A
A__1914c		Lick Obs. Bull. 8, 96, 1914
A__1914d	Ma j	Aitken, R.G.	1914PLicO..12....1A
A__1914d	+orb	Pub. Lick Obs. 12, 1, 1914
A__1914e	orb -	Aitken, R.G.	1914PLicO..12..100A
A__1914e		Pub. Lick Obs. 12, 100, 1914
A__1914f	orb -	Aitken, R.G.	1914LicOB...8...99A
A__1914f		Lick Obs. Bull. 8, 99, 1914
A__1914g	Ma -	Aitken, R.G.	1914PASP...26...53A
A__1914g		PASP 26, 53, 1914 (all data also in other refs)
A__1914h	Ma -	Aitken, R.G.	1914PASP...26..205A
A__1914h		PASP 26, 205, 1914 (all data also in other refs)
A__1914i	Ma -	Aitken, R.G.	1914PASP...26..208A
A__1914i	+orb	PASP 26, 208, 1914 (all data also in other refs)
A__1915	Ma -	Aitken, R.G.	1915PASP...27..230A
A__1915		PASP 27, 230, 1915 (some data also in other refs)
A__1916a	orb -	Aitken, R.G.	1916PASP...28..121A
A__1916a		PASP 28, 121, 1916
A__1916b	Ma -	Aitken, R.G.	1916PASP...28..276A
A__1916b		PASP 28, 276, 1916 (all data also in other refs)
A__1917a	Ma -	Aitken, R.G.	1917PASP...29..207A
A__1917a		PASP 29, 207, 1917 (all data also in other refs)
A__1917b	Ma -	Aitken, R.G.	1917PASP...29..217A
A__1917b		PASP 29, 217, 1917 (all data also in other refs)
A__1918a	Ma -	Aitken, R.G.	1918LicOB...9..132A
A__1918a		Lick Obs. Bull. 9, 132, 1918
A__1918b	orb -	Aitken, R.G.	1918LicOB...9..184A
A__1918b		Lick Obs. Bull. 9, 184, 1918
A__1918c	orb -	Aitken, R.G.	1918LicOB...9..191A
A__1918c		Lick Obs. Bull. 9, 191, 1918
A__1918d	orb -	Aitken, R.G.	1918PAAS....3R..68A
A__1918d		PAAS 3, 68, 1918
A__1918e	Ma -	Aitken, R.G.	1918PASP...30...69A
A__1918e		PASP 30, 69, 1918 (all data also in other refs)
A__1918f	Ma -	Aitken, R.G.	1918PASP...30...71A
A__1918f		PASP 30, 71, 1918 (all data also in other refs)
A__1918g	orb -	Aitken, R.G.	1918PASP...30..194A
A__1918g		PASP 30, 194, 1918
A__1918h	Ma -	Aitken, R.G.	1918PASP...30..262A
A__1918h		PASP 30, 262, 1918 (all data also in other refs)
A__1918i	orb -	Aitken, R.G.	1918PASP...30..311A
A__1918i		PASP 30, 311, 1918
A__1919a	Ma -	Aitken, R.G.	1919PASP...31...44A
A__1919a		PASP 31, 44, 1919 (all data also in other refs)
A__1919b	Ma -	Aitken, R.G.	1919PASP...31..116A
A__1919b		PASP 31, 116, 1919 (all data also in other refs)
A__1919c	Ma -	Aitken, R.G.	1919PASP...31..197A
A__1919c		PASP 31, 197, 1919 (all data also in other refs)
A__1919d	orb -	Aitken, R.G.	1919PASP...31..285A
A__1919d		PASP 31, 285, 1919
A__1920a	Ma -	Aitken, R.G.	1920RGOO.....f...1.
A__1920a		Greenwich Observations, F1, 1920
A__1920b	Ma -	Aitken, R.G.	1920PASP...32...56A
A__1920b		PASP 32, 56, 1920 (most data also in other refs)
A__1920c	orb -	Aitken, R.G.	1920PASP...32..215A
A__1920c		PASP 32, 215, 1920
A__1921a	Ma -	Aitken, R.G.	1921PASP...33...60A
A__1921a		PASP 33, 60, 1921 (all data also in other refs)
A__1921b	Ma -	Aitken, R.G.	1921PASP...33..270A
A__1921b		PASP 33, 270, 1921 (all data also in other refs)
A__1922a	-	Aitken, R.G.	1922PASP...34...52A
A__1922a		PASP 34, 52, 1922 (no data)
A__1922b	orb -	Aitken, R.G.	1922PAAS....4....6A
A__1922b		Pub. AAS 4, 6, 1922
A__1923a	Ma j	Aitken, R.G.	1923LicOB..11...58A
A__1923a	+orb	Lick Obs. Bull. 11, 58, 1923
A__1923b	orb -	Aitken, R.G.	1923PASP...35..258A
A__1923b		PASP 35, 258, 1923
A__1923c	orb -	Aitken, R.G.	1923LicOB..11...66A
A__1923c		Lick Obs. Bull. 11, 66, 1923
A__1923d	orb -	Aitken, R.G.	1923LicOB..11...70A
A__1923d		Lick Obs. Bull. 11, 70, 1923
A__1923e	orb -	Aitken, R.G.	1923LicOB..11...79A
A__1923e		Lick Obs. Bull. 11, 79, 1923
A__1923f	orb -	Aitken, R.G.	1923LicOB..11...83A
A__1923f		Lick Obs. Bull. 11, 83, 1923
A__1923g	orb -	Aitken, R.G.	1923LicOB..11...85A
A__1923g		Lick Obs. Bull. 11, 85, 1923
A__1923h	orb -	Aitken, R.G.	1923LicOB..11...97A
A__1923h		Lick Obs. Bull. 11, 97, 1923
A__1923i	orb -	Aitken, R.G.	1923PASP...35...70A
A__1923i		PASP 35, 70, 1923
A__1923j	Ma -	Aitken, R.G.	1923PASP...35..323A
A__1923j		PASP 35, 323, 1923 (all data also in other refs)
A__1924	Ma -	Aitken, R.G.	1924PASP...36..296A
A__1924		PASP 36, 296, 1924 (all data also in other refs)
A__1925a	orb -	Aitken, R.G.	1925PASP...37..222A
A__1925a	+D	PASP 37, 222, 1925
A__1925b	orb -	Aitken, R.G.	1925LicOB..12...45A
A__1925b		Lick Obs. Bull. 12, 45, 1925
A__1925c	orb -	Aitken, R.G.	1925LicOB..12...47A
A__1925c		Lick Obs. Bull. 12, 47, 1925
A__1925D	Ma -	Aitken, R.G.	1925MNRAS..85..276E
A__1925D		cited by Milburn (MNRAS 85, 276, 1925)
A__1926a	Ma -	Aitken, R.G.	1926PASP...38..131A
A__1926a		PASP 38, 131, 1926 (all data also in other refs)
A__1926b	Ma -	Aitken, R.G.	1926PASP...38..334A
A__1926b		PASP 38, 334, 1926 (all data also in other refs)
A__1927a	Ma -	Aitken, R.G.	1927LicOB..12..170A
A__1927a		Lick Obs. Bull. 12, 170, 1927
A__1927b	Ma j	Aitken, R.G.	1927LicOB..12..173A
A__1927b		Lick Obs. Bull. 12, 173, 1927
A__1927c	orb -	Aitken, R.G.	1927PASP...39...45A
A__1927c		PASP 39, 45, 1927
A__1928	Ma -	Aitken, R.G.	1928PASP...40..355A
A__1928		PASP 40, 355, 1928 (all data also in other refs)
A__1929a	Ma -	Aitken, R.G.	1929LicOB..14...62A
A__1929a		Lick Obs. Bull. 14, 62, 1929
A__1929b	Ma -	Aitken, R.G.	1929LicOB..14...88A
A__1929b		Lick Obs. Bull. 14, 88, 1929
A__1930a	Ma -	Aitken, R.G.	1930PASP...42...60A
A__1930a		PASP 42, 60, 1930 (all data also in other refs)
A__1930b	Ma -	Aitken, R.G.	1930PASP...42..123A
A__1930b		PASP 42, 123, 1930 (most data also in other refs)
A__1932a	Ma -	Aitken, R.G.	1932QB821.A43......
A__1932a		Aitken Double Star Catalogue, 1932
A__1932b	Ma -	Aitken, R.G.	1932QB821.A43......
A__1932b		Aitken Double Star Catalogue, 1932 (formerly combined in means)
A__1932c	orb -	Aitken, R.G.	1932PASP...44..127A
A__1932c		PASP 44, 127, 1932
A__1932d	orb -	Aitken, R.G.	1932PASP...44..129A
A__1932d		PASP 44, 129, 1932
A__1932e	Ma -	Aitken, R.G.	1932PASP...44..132A
A__1932e		PASP 44, 132, 1932 (all data also in other refs)
A__1933a	Ma -	Aitken, R.G.	1933PASP...45...90A
A__1933a		PASP 45, 90, 1933
A__1933b	Ma -	Aitken, R.G.	1933PASP...45..261A
A__1933b		PASP 45, 261, 1933
A__1933c	Ma -	Aitken, R.G.	1933LicOB..16...93A
A__1933c		Lick Obs. Bull. 16, 93, 1933
A__1933d	Ma -	Aitken, R.G.	1933LicOB..16...96A
A__1933d		Lick Obs. Bull. 16, 96, 1933
A__1933e	Ma -	Aitken, R.G.	1933PASP...45..190A
A__1933e		PASP 45, 190, 1933 (all data also in other refs)
A__1934a	Ma -	Aitken, R.G.	1934PASP...46..110A
A__1934a		PASP 46, 110, 1934 (all data also in other refs)
A__1934b	-	Aitken, R.G.	1934PASP...46..284A
A__1934b		PASP 46, 284, 1934 (no data)
A__1935e	Ma j	Aitken, R.G.	1935LicOB..17...91A
A__1935e		Lick Obs. Bull. 17, 91, 1935
A__1935f	-	Aitken, R.G.	1935QB821.A3.......
A__1935f		The Binary Stars, 1935
A__1936	orb -	Aitken, R.G.	1936PASP...48..175A
A__1936		PASP 48, 175, 1936
A__1937a	Ma -	Aitken, R.G.	1937LicOB..18...53A
A__1937a		Lick Obs. Bull. 18, 53, 1937
A__1937b	Ma -	Aitken, R.G.	1937LicOB..18..109A
A__1937b		Lick Obs. Bull. 18, 109, 1937
A__9999	Ma -	Aitken, R.G.	...................
A__9999		Unpublished, manuscript or reference not found.
RAO		Robo AO (Palomar 60" AO project or KPNO 2.1m)	......
RAO2014	Ag j	Law, N.M., Morton, T., Baranec, C., Riddle, R., Ravichandran, G., Ziegler, C.,	2014ApJ...791...35L
RAO2014		Johnson, J.A., Tendulkar, S.P., Bui, K., Burse, M.P., Das, H., Dekany, R., et al.
RAO2014		ApJ 791, 35, 2014
RAO2014		(separation/magnitude difference limits estimated from their Figure 4)
RAO2015	Ag u	Riddle, R.L., Tokovinin, A., Mason, B.D., Hartkopf, W.I., Roberts, L.C., Jr.,	2015ApJ...799....4R
RAO2015	+orb	Baranec, C., Law, N.M., Bui, K., Burse, M.P., Das, H.K., Dekany, R.G.,
RAO2015		Kulkarni, S., Punnadi, S., Ramaprakash, A.N., & Tendulkar, S.P.
RAO2015		ApJ 799, 4, 2015
RAO2015		(Note: Paper includes separation/magnitude difference limits for all stars
RAO2015		observed. These limits have been added to the Interferometric Catalog even for
RAO2015		resolved pairs, to indicate restrictions on any potential additional components.)
RAO2015b	A j	Ziegler, C., Law, N.M., Baranec, C., Riddle, R.L., & Fuchs, J.T.	2015ApJ...804...30Z
RAO2015b	+Ag	ApJ 804, 30, 2015
RAO2016	Ag j	Baranec, C., Ziegler, C., Law, N.M., Morton, T., Riddle, R.L., Atkinson, D.,	2016AJ....152...18B
RAO2016		Schonhut, J., & Crepp, J.
RAO2016		AJ 152, 18, 2016
RAO2017	Ag j	Ziegler, C., Law, N.M., Nicholas, M., Morton, T., Baranec, C., Riddle, R.L.,	2017AJ....153...66Z
RAO2017	+A	Atkinson, D., Baker, A., Roberts, S., & Ciardi, D.R.
RAO2017		AJ 153, 66, 2017
RAO2017b	Ag j	Schonhut-Stasik, J.S., Baranec, C., Huber, D., Ziegler, C., Atkinson, D., Gaidos,	2017ApJ...847...97S
RAO2017b		E., Law, N.M., Riddle, R., Hagelberg, J., van der Marel, N., & Hodapp, K.W.
RAO2017b		ApJ 847, 97, 2017
RAO2018	Ag j	Hillenbrand, L.A., Zhang, C., Riddle, R.L., Baranec, C., Ziegler, C., Law, N.M. &	2018AJ....155...51H
RAO2018		Stauffer, J.
RAO2018		AJ 155, 51, 2018
RAO2018		(Note: Precise date of observation not given. Pleiades assume mean Nov observing
RAO2018		date of 2014.86. Other targets given mean date of 2014.91.)
RAO2018b	Ag j	Ziegler, C., Law, N.M., Baranec, C., Riddle, R., Duev, D.A., Howard, W.,	2018AJ....155..161Z
RAO2018b		Jensen-Clem, R., Kulkarni, S.R., Morton, T. & Salama, M.
RAO2018b		AJ 155, 161, 2018
RAO2018c	Hg j	Ziegler, C., Law, N.M., Baranec, C., Morton, T., Riddle, R., De Lee, N., Huber, D.,	2018AJ....156..259Z
RAO2018c		Mahadevan, S. & Pepper, J.
RAO2018c		AJ 156, 259, 2018
RAO2019	Ag j	Bowler, B.P., Hinkley, S., Ziegler, C., Baranec, C., Gizis, J.E., Law, N.M., Liu,	2019ApJ...877...60B
RAO2019		M.C., Shah, V.S., Shkolnik, E.L., Riaz, B. & Riddle, R.
RAO2019		ApJ 877, 60, 2019
RAO2020a	Ag j	Schonhut-Stasik, J.S., Huber, D., Baranec, C., Lamman, C., Salama, M., Jensen-Clem,	2020ApJ...883...34S
RAO2020a		R., Duev, D.A., Riddle, R., Kulkarni, S.R. & Law, N.M.
RAO2020a		ApJ 883, 34, 2020
RAO2020b	Ag+ j	Lamman, C., Baranec, C., Berta-Thompson, Z.K., Law, N.M., Schonhut-Stasik, J.,	2020AJ....159..139L
RAO2020b	+A	Ziegler, C., Salama, M., Jensen-Clem, R., Duev, D.A., Riddle, R., Kulkarni, S.R.,
RAO2020b		Winters, J.G. & Irwin, J.M.
RAO2020b		AJ 159, 139, 2020
RAO2020c	Ag j	Laos, S., Stassun, K.G. & Mathieu, R.D.	2020ApJ...902..107L
RAO2020c		ApJ 902, 107, 2020
RAO2021	Ag j	Salama, M., Ou, J., Barance, C., Liu, M.C., Bowler, B.P., Barnes, P., Bonnet, M.,	2021AJ....162..102S
RAO2021		Chun, M., Duev, D.A., Goebel, S., Hall, D., Jacobson, S., Jensen-Clem, R., Law,
RAO2021		N.M., Lockhart, C., Riddle, R., Situ, H., Warmbier, E. & Zhang, Z.
RAO2021		AJ 162, 102, 2021
RAO2022	Ag j	Salama, M., Ziegler, C., Baranec, C., Liu, M.C., Law, N.M., Riddle, R., Henry,	2022AJ....163..200S
RAO2022		T.J., Winters, J.G., Jao, W.-C., Ou, J. & Ruiz, A.H.
RAO2022		AJ 163, 200, 2022

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18123+0154	A 2260	AB	2012	15	107	2.0	8.56	11.70	G5		181218.16+015350.8
18123+0154	A 2260	AB	2015	16	107	2.0	8.56	11.70	G5		181218.16+015350.8
18123+0154	A 2260	AB	2016	17	107	2.0	8.56	11.70	G5		181218.16+015350.8
18123+0154	A 2260	AB	2021	18	107	1.9	8.56	11.70	G5		181218.16+015350.8

If you need more information about this double, apply for a data request form to the WDS.

WDS 18123+0154 A 2260 AB (HD 166823) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18123+0154 A 2260 AB (HD 166823) : MEASURES

No records found.

WDS 18123+0154 (HD 166823) : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 18123+0154 (HD 166823) : ALADIN DSS IMAGE @ 18^h 12^m 18.16^s +01° 53' 50.8"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18123+0154 A 2260 AB (HD 166823) : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		18123+0154	A 2260	AB	107	1.9
Show		18123+0154	RAO 66	AC	72	17.2
Show		18117+0200	BAL1499		151	6.3	11
Show		18121+0207	BAL1957		231	8.7	15
Show		18103+0209	DAL 18	AB	274	12.5	34
Show		18103+0209	DAL 18	AC	314	45.0	34
Show		18129+0228	HEI 559		173	0.8	36
Show		18104+0232	STF2288		58	15.9	48
Show		18128+0243	BAL1958		140	3.9	50
Show		18130+0243	BAL1959	AB	31	23.1	50
Show		18130+0243	BAL1959	AC	66	15.4	50
Show		18130+0243	BAL1959	BC	171	13.8	51
Show		18103+0235	BU 638	BC	4	1.8	51
Show		18103+0235	STF2287	AB	153	22.9	51
Show		18103+0235	BU 638	AD	222	59.7	51
Show		18103+0235	BU 638	AE	344	13.7	51
Show		18152+0229	BAL1961		358	17.4	56
Show		18113+0058	CVR 212		346	99.8	58
Show		18083+0209	BAL1954		226	13.6	61
Show		18121+0258	GRV 231		181	50.7	66
Show		18144+0251	BAL1960		176	13.8	66
Show		18079+0153	OSO 93	AB	21	12.7	66
Show		18079+0153	OSO 93	AC	295	13.1	66
Show		18079+0153	OSO 93	AD	171	17.6	66
Show		18079+0153	OSO 93	AE	66	21.7	66
Show		18079+0153	OSO 93	AF	194	20.9	66
Show		18081+0213	BU 636	AB	120	1.4	66
Show		18081+0213	BU 636	AC	93	11.7	66
Show		18081+0213	BU 636	AD	348	40.8	66
Show		18081+0213	GII 259	Aa,Ab	168	0.1	66
Show		18097+0247	BAL1955		174	28.4	66
Show		18083+0230	NYS 7	BC	84	16.0	67
Show		18083+0230	BAL1953	AB	122	17.1	67
Show		18080+0222	WLY 9		94	16.4	70
Show		18076+0224	BAL1952		153	13.5	78
Show		18074+0227	BAL1951		251	3.2	81
Show		18150+0304	SLE 145		27	11.5	81
Show		18069+0159	BAL1498		255	3.0	81
Show		18099+0307	BU 637	AB	191	7.2	82
Show		18099+0307	BU 637	AC	245	98.2	82
Show		18099+0307	YSC 132	Aa,Ab	357	0.0	82
Show		18153+0305	SLE 146	AB	151	18.4	85
Show		18153+0305	SLE 146	AC	157	49.8	85
Show		18166-0058	RST5109		114	2.1	86
Show		18104+0033	STF2286		315	3.0	87
Show		18117-0023	TDT 732		47	0.4	92
Show		18080-0047	RST5102		305	3.6	93
Show		18090+0315	BAL2477		162	18.8	95
Show		18087+0034	NSN 702		313	3.7	97
Show		18061+0127	BAL1497		160	7.2	97
Show		18110-0020	NSN 151		152	4.0	97

WDS 18123+0154 : COMPONENTS

	A	B
B	pa=106.5° sep=1.95"
C	pa=71.9° sep=17.23"	pa=67.8° sep=15.66"

18123+0154 A

Name	HD 166823	Coord arcsec 2000	181218.16+015350.8	Mag	8.56	Spectral class	G5 (yellow)
PmRA	0.00	PmDE	-37.0	SAO	123240	HIP	89207
Tycho2	0435-01944-1	HD	166823	BD	BD+01 3620

Tycho2

Tycho2	0435-01944-1	Pflag		RAmdeg	273.07567104	DEmdeg	1.89744273
PmRA	-6.1	PmDE	-41.2	E RAmdeg	9	E DEmdeg	10
E pmRA	1.1	E pmDE	1.1	EpRAm	1990.12	EpDEm	1990.12
Num	10	Q RAmdeg	1.3	Q DEmdeg	1.0	Q pmRA	1.4
Q pmDE	1.1	BTmag	9.285	E BTmag	0.021	VTmag	8.558
E VTmag	0.015	Prox	21	TYC	T	HIP	89207
CCDM	A	RAdeg	273.07568361	DEdeg	1.89753639	EpRA 1990	1.91
EpDE 1990	1.89	E RAdeg	8.6	E DEdeg	10.1	Posflg
Corr	-0.1

SAO

SAO	123240	DelFlag		RA1950		PmRA1950	0.0004
DE1950		PmDE1950	-0.04	Vmag	8.5	SpType	G5
Double code		Source	30	CatNum	6140	DM	BD+01 3620
DMcomp		BDsup		HD	166823	M HD	0
GC		RA1950rad	4.75504872	DE1950rad	0.03289208	PmRA2000	0.0006
PmDE2000	-0.04

Hipparcos

Catalog	H	HIP	89207	Proxy	H	RAhms	18 12 18.16
DEdms	+01 53 51.1	Vmag	8.51	VarFlag		R Vmag	G
RAdeg	273.076	DEdeg	1.89754	AstroRef	A	Plx	16.54
CCDM	18123+0154	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	109	Rho	2.136	HD	166823	BD	BD+01 3620
CD		CP		Dm number	+01 3620	VIred	0.72
SpType	G5	R SpType		Coord arcsec 2000	181218.16+015351.1

Hipparcos 2

HIP	89207	Sn	15	So	3	Nc	2
RArad	4.7660697454	DErad	0.0331182818	Plx	16.56	PmRA	-1.21
PmDE	-39.59	E RArad	0.79	E DErad	0.67	E Plx	0.94
E pmRA	0.83	E pmDE	0.68	Hpmag	8.5815	E Hpmag	0.0022
SHp	0.012	VA	0	BV	0.756	E BV	0.126
VI	0.72

CCDM

Ccdm	18123+0154	RComp		Comp	A	Note1
Note2		Discov num		DRAs	0.15	DDEs	-9.7
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	8.4	Sp	G5	PmNote	*
PmRA	-5	PmDE	-50	Dm number	+01 3620	Cat1	BD
Name2	+01 2094	Cat2	AGK2/3	HD	166823	M HD
ADS BDS	A11148	M ADS BDS		N IDS		IDS	18072N0153A
HIC	89207

18123+0154 B

Coord arcsec 2000	181218.28+015350.2		Mag	11.7		PmRA	-2.00		PmDE	-40.0
Calc delta mag	3.14		Calc coord	yes

CCDM

Ccdm	18123+0154	RComp		Comp	B	Note1
Note2		Discov num	A 2260	DRAs		DDEs
R dRAs		Year	1910	Theta	117	Rho	2.4
Obs	8	Vmag	12.0	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A11148	M ADS BDS		N IDS		IDS	18072N0153B
HIC	89207

18123+0154 C

Coord arcsec 2000

181219.25+015356.2

Mag

15.9

Calc delta mag

7.34

Calc coord

yes