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Current system
18097+5024
HU 674
HD 166820


Nearby doubles
6' : 18094+5019
UC 236

19' : 18110+5038
HDS2564

20' : 18116+5027
ES 782

29' : 18109+4958
KPP3328

36' : 18118+4955
COU2393

37' : 18075+5054
KPP4085

38' : 18066+5001
STF2290AB

42' : 18104+5104
COU2392

49' : 18147+5027
TDT 760

49' : 18071+4943
STT 344

51' : 18120+5110
AG 359AB

54' : 18133+4944
HDS2572

57' : 18046+5053
STF2279

60' : 18041+5053
COU2391

63' : 18144+5107
ES 783

63' : 18061+5116
COU2514

68' : 18046+5111
WIS 323

77' : 18109+5139
ES 642

82' : 18172+5103
AG 220

84' : 18162+5120
STF2305AB

86' : 18182+5050
ES 647

87' : 18126+5146
KPP4093

90' : 18091+5153
WIS 325

91' : 18009+4954
LDS4770

94' : 18001+5045
KPP1193

95' : 17598+5039
COU2390



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

18097+5024 HU 674 (HD 166820)

 
 
18h 09m 40.64s +50° 24' 07.4" P.A. 213.00 sep 0.7 mag 7.68,8.63 Sp A3V dist. 141.04 pc (460.07 l.y.)
 
 
Coord 2000 18097+5024 Discov num HU  674 Comp Coord arcsec 2000 18 09 40.64 +50 24 07.4
Date first 1904 Date last 2018 Obs 66
Pa first 279 Pa last 213 P.A. Now (θ) 213°
Sep first 0.5 Sep last 0.732 Sep. Now (ρ) 0.732"
Mag pri 7.68 Mag sec 8.63 delta mag (ΔM) 0.95 Spectral class A3V (white)
Pri motion ra +007 Sec motion ra +007
Pri motion dec +007 Sec motion dec +007
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 166820 Constellation Hercules SAO 30776 HIP 88975
Tycho2 3532-01029-1 Gaia DR2 2124653942613840000 HD 166820 GC 24792
ADS 11128 BD BD+50 2531 Distance 141.04 Distance ly 460.07
 
 
ORBITAL ELEMENTS
 
 
Period (P)773.2y Periastron (T)2050.5y Semi-major axis (a)1.981a
Eccentricity (e)0.796 Inclination (i)101.7° Longitude of periastron (ω)66.9°
Node (Ω)203° Notes ReferenceMsn2017e
Equinox2000 Last observation2009 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 220.4 0.745
2001 220.0 0.746
2002 219.6 0.747
2003 219.2 0.748
2004 218.8 0.749
2005 218.4 0.749
2006 218.0 0.750
2007 217.6 0.750
2008 217.2 0.750
2009 216.8 0.750
2010 216.4 0.750
2011 216.0 0.749
2012 215.6 0.749
2013 215.2 0.748
2014 214.8 0.746
2015 214.4 0.745
2016 214.0 0.743
2017 213.6 0.740
2018 213.2 0.738
2019 212.8 0.735
2020 212.4 0.731
2021 211.9 0.728
2022 211.5 0.723
2023 211.1 0.718
2024 210.6 0.713
2025 210.2 0.707
2026 209.7 0.701
2027 209.3 0.694
2028 208.8 0.686
2029 208.3 0.677
2030 207.8 0.668


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds18097%2B5024e.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18097+5024 HU 674 (HD 166820) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Msn2017e orb - Josties, J. & Mason, B.D. 2017IAUDS.193....1M
Msn2017e Inf. Circ. 193, 1, 2017
 
 
DISCOVERER
 
 
idgroup discov author
1 HU Hussey, W.F.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18097+5024 HU 674 2006 55 221 0.7 7.68 8.63 A3V OD 180940.64+502407.4
18097+5024 HU 674 2009 57 216 0.7 7.68 8.63 A3V OD 180940.64+502407.4
18097+5024 HU 674 2010 60 215 0.8 7.68 8.63 A3V OD 180940.64+502407.4
18097+5024 HU 674 2011 61 212 0.7 7.68 8.63 A3V OD 180940.64+502407.4
18097+5024 HU 674 2013 61 215 0.8 7.68 8.63 A3V OD 180940.64+502407.4
18097+5024 HU 674 2015 62 213 0.8 7.68 8.63 A3V O 180940.64+502407.4
18097+5024 HU 674 2018 64 214 0.7 7.68 8.63 A3V O 180940.64+502407.4

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

 
 
WDS 18097+5024 HU 674 (HD 166820) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18097+5024 HU 674 (HD 166820) : MEASURES
 
 
No records found.

 
 
WDS 18097+5024 (HD 166820) : VIRTUAL EYEPIECE
 
 

18097+5024 HU 674A mag 7.68 Sp A3V 18097+5024 HU 674B sep 0.7 P.A. 202.50 mag 8.63 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 18097+5024 (HD 166820) : ALADIN DSS IMAGE @ 18h 09m 40.64s +50° 24' 07.4"
 
 
 
 
WDS 18097+5024 HU 674 (HD 166820) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18097+5024 HU 674 distance=1' 18094+5019 UC 236 distance=6' 18110+5038 HDS2564 distance=19' 18116+5027 ES 782 distance=20' 18109+4958 KPP3328 distance=29' 18118+4955 COU2393 distance=36' 18075+5054 KPP4085 distance=37' 18066+5001 COU2276Aa,Ab distance=38' 18066+5001 STF2290AB distance=38' 18066+5001 STF2290AC distance=38' 18104+5104 COU2392 distance=42' 18147+5027 TDT 760 distance=49' 18071+4943 STT 344 distance=49' 18120+5110 AG 359AB distance=51' 18120+5110 ABH 96AD distance=51' 18120+5110 ABH 96AE distance=51' 18120+5110 ABH 96AF distance=51' 18120+5110 AG 359AC distance=51' 18120+5110 AG 359BC distance=51' 18133+4944 HDS2572 distance=54' 18046+5053 STF2279 distance=57' 18041+5053 COU2391 distance=60' 18144+5107 ES 783 distance=63' 18061+5116 COU2514 distance=63' 18164+5014 UC 3540CD distance=66' 18164+5014 JNN 117DE distance=66' 18046+5111 WIS 323 distance=68' 18109+5139 ES 642 distance=77' 18172+5103 AG 220 distance=82' 18162+5120 STF2305AB distance=84' 18162+5120 STF2305AC distance=84' 18182+5050 ES 647 distance=86' 18126+5146 KPP4093 distance=87' 18091+5153 WIS 325 distance=90' 18009+4954 LDS4770 distance=91' 18001+5045 KPP1193 distance=94' 17598+5039 COU2390 distance=95' 18054+5155 COU2513 distance=100' 18169+4856 LDS5174AB distance=113' 18105+5217 KPP4089 distance=114' 18095+4829 TDT 713 distance=116' 18152+5209 ES 646 distance=118' 18099+4824 STF2293AB distance=121' 17578+5107 DAM 686 distance=121' 18207+5131 RAO 388 distance=124' 17574+5111 ES 78AB distance=126' 17574+5111 FOX9011AC distance=126' 18146+4827 SHN 228 distance=127' 18132+5228 TDT 740 distance=129' 18220+5122 UC 3560 distance=130' 17593+4902 YSC 64AB distance=130' grafico limitrofi
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 18097+5024 HU 674 213 0.7 1
Show 18094+5019 UC 236 322 13.5 6
Show 18110+5038 HDS2564 306 0.4 19
Show 18116+5027 ES 782 114 8.7 20
Show 18109+4958 KPP3328 63 4.1 29
Show 18118+4955 COU2393 78 1.9 36
Show 18075+5054 KPP4085 249 24.9 37
Show 18066+5001 COU2276 Aa,Ab 4 0.3 38
Show 18066+5001 STF2290 AB 351 4.0 38
Show 18066+5001 STF2290 AC 69 178.1 38
Show 18104+5104 COU2392 147 0.6 42
Show 18147+5027 TDT 760 139 0.5 49
Show 18071+4943 STT 344 140 2.3 49
Show 18120+5110 AG 359 AB 306 23.3 51
Show 18120+5110 ABH 96 AD 298 62.1 51
Show 18120+5110 ABH 96 AE 8 77.1 51
Show 18120+5110 ABH 96 AF 16 47.4 51
Show 18120+5110 AG 359 AC 333 10.4 51
Show 18120+5110 AG 359 BC 107 14.7 51
Show 18133+4944 HDS2572 69 14.6 54
Show 18046+5053 STF2279 180 13.6 57
Show 18041+5053 COU2391 97 2.2 60
Show 18144+5107 ES 783 229 10.8 63
Show 18061+5116 COU2514 35 0.1 63
Show 18164+5014 UC 3540 CD 177 19.5 66
Show 18164+5014 JNN 117 DE 333 0.7 66
Show 18046+5111 WIS 323 193 187.4 68
Show 18109+5139 ES 642 273 7.2 77
Show 18172+5103 AG 220 126 10.9 82
Show 18162+5120 STF2305 AB 334 5.1 84
Show 18162+5120 STF2305 AC 197 94.5 84
Show 18182+5050 ES 647 291 2.4 86
Show 18126+5146 KPP4093 337 6.0 87
Show 18091+5153 WIS 325 82 999.9 90
Show 18009+4954 LDS4770 213 1.5 91
Show 18001+5045 KPP1193 108 9.3 94
Show 17598+5039 COU2390 179 0.1 95
Show 18054+5155 COU2513 54 1.0 100
Show 18169+4856 LDS5174 AB 155 109.7 113
Show 18105+5217 KPP4089 336 2.6 114
Show 18095+4829 TDT 713 332 0.5 116
Show 18152+5209 ES 646 197 10.8 118
Show 18099+4824 STF2293 AB 83 12.8 121
Show 17578+5107 DAM 686 191 6.7 121
Show 18207+5131 RAO 388 51 0.2 124
Show 17574+5111 ES 78 AB 130 8.1 126
Show 17574+5111 FOX9011 AC 194 31.6 126
Show 18146+4827 SHN 228 -1 0.1 127
Show 18132+5228 TDT 740 9 0.7 129
Show 18220+5122 UC 3560 292 66.1 130
Show 17593+4902 YSC 64 AB 42 0.7 130

 
 
WDS 18097+5024 : COMPONENTS
 
 
  A
B pa=202.5°
sep=0.66"
 
 
18097+5024 A
 
 
Componente originario normalizzato AB Name HD 166820 Coord arcsec 2000 180940.64+502407.4 Mag 7.68
Spectral class A3V (white) PmRA 7.00 PmDE 7.0 SAO 30776
HIP 88975 Tycho2 3532-01029-1 HD 166820 GC 24792
BD BD+50 2531
Tycho2
Tycho2 3532-01029-1 Pflag RAmdeg 272.41928816 DEmdeg 50.40203099
PmRA 7.4 PmDE 7.1 E RAmdeg 5 E DEmdeg 5
E pmRA 1.2 E pmDE 1.3 EpRAm 1991.22 EpDEm 1991.35
Num 11 Q RAmdeg 1.4 Q DEmdeg 1.4 Q pmRA 1.4
Q pmDE 1.5 BTmag 7.608 E BTmag 0.015 VTmag 7.393
E VTmag 0.011 Prox 999 TYC T HIP 88975
CCDM AB RAdeg 272.41926167 DEdeg 50.40201500 EpRA 1990 1.57
EpDE 1990 1.67 E RAdeg 4.9 E DEdeg 4.6 Posflg P
Corr -0.1
SAO
SAO 30776 DelFlag RA1950 PmRA1950 0.0013
DE1950 PmDE1950 0.016 Vmag 7 SpType A2
Double code Source 70 CatNum 24792 DM BD+50 2531
DMcomp BDsup HD 166820 M HD 0
GC 24792 RA1950rad 4.74929577 DE1950rad 0.87948844 PmRA2000 0.0019
PmDE2000 0.017
Hipparcos
Catalog H HIP 88975 Proxy H RAhms 18 09 40.64
DEdms +50 24 07.4 Vmag 7.29 VarFlag R Vmag H
RAdeg 272.419 DEdeg 50.4021 AstroRef A Plx 6.79
CCDM 18097+5024 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 224 Rho 0.73 HD 166820 BD BD+50 2531
CD CP Dm number +50 2531 VIred 0.15
SpType A2 R SpType Coord arcsec 2000 180940.64+502407.4
Hipparcos 2
HIP 88975 Sn 15 So 3 Nc 2
RArad 4.7546139575 DErad 0.8796817203 Plx 7.09 PmRA 6.49
PmDE 7.73 E RArad 0.82 E DErad 0.93 E Plx 0.84
E pmRA 1.15 E pmDE 1.38 Hpmag 7.3527 E Hpmag 0.0013
SHp 0.009 VA 0 BV 0.19 E BV 0.011
VI 0.21
CCDM
Ccdm 18097+5024 RComp Comp A Note1
Note2 Discov num DRAs -1.26 DDEs 7.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.5 Sp A2 PmNote *
PmRA 17 PmDE 7 Dm number +50 2531 Cat1 BD
Name2 +50 1275 Cat2 AGK2/3 HD 166820 M HD
ADS BDS A11128 M ADS BDS N IDS IDS 18072N5023A
HIC 88975
 
 
18097+5024 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 180940.61+502406.8 Mag 8.63 PmRA 7.00
PmDE 7.0 Calc delta mag 0.95 Calc coord yes
CCDM
Ccdm 18097+5024 RComp Comp B Note1
Note2 Discov num HU 674 DRAs DDEs
R dRAs Year 1958 Theta 243 Rho 0.5
Obs 17 Vmag 8.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A11128 M ADS BDS N IDS IDS 18072N5023B
HIC 88975