18379-2124 OCC 33 (HD 171856)

18^h 37^m 54.43^s -21° 23' 51.2" P.A. -1.00 sep 0.1 mag 6.50,6.50 Sp kA9hA7V.. dist. 104.38 pc (340.49 l.y.)

Coord 2000	18379-2124	Discov num	OCC 33	Comp		Coord arcsec 2000	18 37 54.43 -21 23 51.2
Date first	1925	Date last	1925	Obs	0
Pa first	-1	Pa last	-1	P.A. Now (θ)	-1
Sep first	0.1	Sep last	0.1	Sep. Now (ρ)	0.1"
Mag pri	6.50	Mag sec	6.50	delta mag (ΔM)	0	Spectral class	kA9hA7V..
Pri motion ra	-002	Sec motion ra
Pri motion dec	-066	Sec motion dec
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 171856	Constellation	Sagittarius	SAO	187071	HIP	91347
Tycho2	6279-01724-1	Gaia DR2	4079636675440568960	HD	171856	HR	6988
GC	25450	BD	BD-21 5076	FK5	1485	Distance	104.38
Distance ly	340.49

WDS 18379-2124 OCC 33 (HD 171856) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
OCC1971	O j	Taylor, G.E., O'Leary, B., van Fladern, T.C. Bartholdi, P., Owen, F.,	1971Natur.234..405T
OCC1971		Hubbard, W.B., Smith, B.A., Smith, S.A., Fallon, F.W. Devinney, E.J. & Oliver, J.
OCC1971		Nature 234, 405, 1971 (also summarized in OCC2010)
OCC1972	O j	Hubbard, W.B. & van Flandern, T.C.	1972AJ.....77...65H
OCC1972		AJ 77, 65, 1972
OCC1976	O j	Taylor, G.E., Walker, E.N., Quintanilla, A.R. & Lopez de Coca, M.P.	1976A&A....50..121T
OCC1976		A&A 50, 121, 1976 (also summarized in OCC2010)
OCC1990	O j	Dunham, D.W., Dunham, J.B., Binzel, R.P., Evans, D.S., Freuh, M., Henry, G.W.,	1990AJ.....99.1636D
OCC1990		A'Hearn, M.A., Schnurr, R., Betts, R., Haynes, H., Orcutt, R., Bowell, E., et al.
OCC1990		AJ 99, 1636, 1990 (also summarized in OCC2010)
OCC1993	O j	Sato, I., Soma, M. & Hirose, T.	1993AJ....105.1553S
OCC1993		AJ 105, 1553, 1993 (also summarized in OCC2010)
OCC2001	O -	Vasundhara, R., Jayakumar, K., Velu, C., Appakutty, M., Paranjpye, A.,	2001BASI...29..577V
OCC2001		Kulkarni, H., Nitsure, P., Prabhunne, M. & Shah, K.
OCC2001		Bull. Astr. Soc. India 29, 577, 2001 (also summarized in OCC2010)
OCC2002	O -	Occult. Doubles Cat., D. Dunham, ed.	.
OCC2002		http://www.lunar-occultations.com/iota/iotandx.htm
OCC2008	O j	Ling, A.	2008JRASC.102...15L
OCC2008		JRASC 102, 15, 2008
OCC2009	O u	Herald, D. and Sandy, R.	2009JDSO....5..208H
OCC2009		JDSO 5, 208, 2009
OCC2009b	O j	Lin, C.-L., Zhang, Z.-W., Chen, W.P., King, S.-K., Lin, H.-C., Bianco, F.B.,	2009PASP..121..359L
OCC2009b		Lehner, M.J., Coehlo, N., Wang, J.-H., Mondal, S., Alcock, C., Axelrod, T., et al.
OCC2009b		PASP 121, 359, 2009 (also summarized in OCC2010)
OCC2010	O u	Herald, D., Boyle, R., Dunham, D., Hirose, T., Maley, P., Timerson, B., Farris,	2010JDSO....6...88H
OCC2010		T., Frappa, E., Lecacheux, J., Hayamizu, T., Kozubal, M., Nolthenius, R., et al.
OCC2010		JDSO 6, 88, 2010
OCC2010b	O u	Herald, D., Loader, B. & Parker, S.	2010JDSO....6..150H
OCC2010b		JDSO 6, 150, 2010
OCC2010c	O -	Herald, D., Kashiwagura, M., Loader, B., Messner, S., Sandy, R. & Togashi, H.	2010JDSO....6..152H
OCC2010c		JDSO 6, 152, 2010
OCC2010d	O u	Loader, B., Asada, Y., Breit, D., Bradshaw, J., Gault, D., Herald, D., Iverson,	2010JDSO....6..176L
OCC2010d		E., Ishida, M., Karasaki, H., Kashiwagura, M., Miyashita, K., Messner, S., et al.
OCC2010d		JDSO 6, 176, 2010
OCC2011	O u	George, T., Timerson, B., Coughlin, K. & Fleishman, R.	2011JDSO....7..129G
OCC2011		JDSO 7, 129, 2011
OCC2011b	O u	Loader, B. Bradshaw, J., Breit, D., Gault, D., George, T., Herald, D., Iverson,	2011JDSO....7..159L
OCC2011b		E., Ishida, M., Karasaki, H., Kashiwagura, M., Kenmotsu, K., Lowe, D., et al.
OCC2011b		JDSO 7, 159, 2011
OCC2011c	O u	George, T., Timerson, B., Cooke, B., Degenhardt, S., Dunham, D.W., Messner, S.,	2011JDSO....7..169G
OCC2011c		Suggs, R., Venable, R. & Warren, W.H.
OCC2011c		JDSO 7, 169, 2011
OCC2011d	O -	George, T., Timerson, B., Beard, T., Blank, T., Dantowitz, R., Davis, J.,	2011JDSO....7..175G
OCC2011d		di Cicco, D., Dunham, D.W., Hill, M., Sliski, A. & Sumner, R.
OCC2011d		JDSO 7, 175, 2011
OCC2011e	O j	Bulder, H., Loader, B., Herald, D., Messner, S., Ling, A., Raab, H.,	...................
OCC2011e		Culbertson, B., Black, S., Ishida, M., Ohno, T., & Miyashita, K.
OCC2011e		J. for Occultation Astron., #3, Jul-Sep 2011 (some data also in OCC2008)
OCC2012a	O j	George, T., Timerson, B., Degenhardt, S., Bracken, C., Cadmus, R., Carcich, A.,	2012JDSO....8..306G
OCC2012a		Centala, J., Modic, R., & Slauson, D.
OCC2012a		JDSO 8, 306, 2012
OCC2012b	O u	Loader, B., Asada, Y., Bradshaw, J., Breit, D., Fuertes, J., Gault, D., George,T.,	2012JDSO....8..313L
OCC2012b		Graham, P., Herald, D., Holenstein, B., Iverson, E., Ishida, M., et al.
OCC2012b		JDSO 8, 313, 2012
OCC2013a	O -	George, T., Timerson, B., Brooks, J., Conrad, S., Dunham, J.B., Dunham, D.W.,	2013JDSO....9...88G
OCC2013a		Jones,R., Lipka, T.R., Thomas, W., Warren, W.J., Jr., Wasson, R. & Wisniewski, J.
OCC2013a		JDSO 9, 88, 2013
OCC2013b	O j	Giacchini, B.L., Timerson, B., George, T., Degenhardt, S. & Herald, D.	2013JDSO....9..130G
OCC2013b		JDSO 9, 130, 2013
OCC2013c	O j	Casas, R., Juan, J., Naves, R., Perello, C., Rovira, J., Selva, A. & Schnabel, C.	2013JDSO....9..183C
OCC2013c		JDSO 9, 183, 2013
OCC2013d	O j	Herald, D., Talbot, J., Bradshaw, J., Broughton, J., Hanna, W. & Watson, D.	2013JDSO....9..226H
OCC2013d		JDSO 9, 226, 2013
OCC2013e	O -	Herald, D.	2013JDSO....9..274H
OCC2013e		JDSO 9, 274, 2013
OCC2014a	O -	Loader, B.	2014JDSO...10....2L
OCC2014a		JDSO 10, 2, 2014
OCC2014b	O -	Gault, D.	2014JDSO...10....4G
OCC2014b		JDSO 10, 4, 2014
OCC2014c	O -	Herald, D., Talbot, J., Chad, C., Broughton, J. & Anderson, P.	2014JDSO...10...29H
OCC2014c		JDSO 10, 29, 2014
OCC2014d	O j	Herald, D., Talbot, J. & Kerr, S.	2014JDSO...10..107H
OCC2014d		JDSO 10, 107, 2014
OCC2014e	O u	Loader, B., Bradshaw, J., Breit, D., Edens, E., Forbes, M., Gault, D., George, T.,	2014JDSO...10..150L
OCC2014e		Haymes, T., Herald, D., Holenstein, B., Ito, T., Iverson, E., et al.
OCC2014e		JDSO 10, 150, 2014
OCC2014f	O -	Soma, M., Hayamizu, T., Ishida, M., Owada, M., Ida, M., Aikawa, R., Hashimoto, A.,	2014JDSO...10..240S
OCC2014f		Horaguchi, T., Kitazaki, K., Uchiyama, S., Uehara, S., Yaeza, A., et al.
OCC2014f		JDSO 10, 240, 2014
OCC2016a	O j	Loader, B., Asai, A., Bardecker, J., Bradshaw, J., Breit, D., Buettner, D.,	2016JDSO...12..143L
OCC2016a		Chad, C., Denyer, P., Edens, E., Forbes, M., Gault, D., George, T., et al.
OCC2016a		JDSO 12, 143, 2016
OCC2016b	O -	Gault, D. & Herald, D.	2016JDSO...12..556G
OCC2016b		JDSO 12, 556, 2016
OCC2017a	O j	Loader, B., Anderson, P., Asai, A., Bradshaw, J., Breit, D., Forbes, M.,	2017JDSO...13..585L
OCC2017a		Gault, D., George, T., Haymes, T., Herald, D., Ishida, M., Kerr, S., et al.
OCC2017a		JDSO 13, 585, 2016
OCC2018a	O j	Timerson, B., George, T., Blank, T., Maley, P., Messner, S. & Moore, J.	2018JDSO...14..395T
OCC2018a		JDSO 14, 395, 2018	.
OCC2019a	O j	Timerson, B., George, T., Bean, J., Blank, T., Bardecker, J., Dunham, D., Dunham,	2019JDSO...15..162T
OCC2019a		J., Gimple, B., Maley, P., Anthony, S., Wiesenborn, C., Hunt, T., Sumner, R. &
OCC2019a		Thomas, W.
OCC2019a		JDSO 15, 162, 2019	.
OCC2019b	O j	Hirose, T., Ida, M., Yamamura, H., Uchiyama, S., Hashimoto, A., Aikawa, R.,	2019JDSO...15..268H
OCC2019b		Terakubo, K., Sato, M. & Shima, K.
OCC2019b		JDSO 15, 268, 2019	.
OCC2019c	O j	Loader, B., Asada, Y., Asai, A., Bardecker, J., Bourgeois, J., Bradshaw, J., Chad,	2019JDSO...15..503L
OCC2019c		C., Ellington, C., Gault, D., Giacchini, B., Haymes, T., Herald, D., Ishida, M.,
OCC2019c		Iverson, E., Kerr, S., Manek, J., McKay, G., Messner, S., Pratt, A., Sandy, R.,
OCC2019c		Watanabe, H., Yamamura, H. & Yoshida, H.
OCC2019c		JDSO 15, 503, 2019	.
OCC2019d	O j	Giacchini, B.L., George, T., Spagnotto, J. & Wilberger, A.J.	2019JDSO...15..554G
OCC2019d		JDSO 15, 554, 2019	.
OCC2020a	O -	Perello, C., Frappa, E., Janik, T., Kattentidt, B., Polak, J., Rottenborn, M. &	2020JDSO...16...87P
OCC2020a		Selva, A.
OCC2020a		JDSO 16, 87, 2020
OCC2020b	O	Herald, D.	2020JDSO...16..113H
OCC2020b		JDSO 16, 105, 2020
OCC2020c	O	Bardecker, J. & Messner, S.	2020JDSO...16..405B
OCC2020c		JDSO 16, 405, 2020
OCC2020d	O	Gault, D., Barry, T., Nosworthy, P., Hanna, W., Messner, S., Oesper, D., Dunford,	2020JDSO...16..440G
OCC2020d		R., Trank, R., Preston, S. & Herald, D.
OCC2020d		JDSO 16, 440, 2020
OCC2020e	O	Boutet, M. & Sanchez, J.	2020JDSO...16..483B
OCC2020e		JDSO 16, 483, 2020
OCC2021a	O	Hayamizu, T., Soma, M., Watanabe, Ha., Asai, A., Watanable, Hi. & Nohara, H.	2021JDSO...17..131H
OCC2021a		JDSO 17, 131, 2021
OCC2021b	O	Frappa, E., Zeleny, P., Baruffetti, P., Bendjeddou, A., Bigi, M., Bouazara, O.,	2021JDSO...17..230F
OCC2021b		Gacem, A., Khenifer, H.M., Mokhtari, L., Nosal, P., Rayane, H., Selimi, T.E.M.,
OCC2021b		Sposetti, S. & Aissa, D.B.
OCC2021b		JDSO 17, 230, 2021
OCC2022a	O	Hayamizu, T., Soma, M., Watanabe, Hi., Asai, A., Watanable, Ha., Akira, A.,	2022JDSO...18...61H
OCC2022a		Ida, M., Uchiyama, S., Nagata, T., Yamamura, H., Owada, M. & Yamashita, M.
OCC2022a		JDSO 18, 61, 2022
OCC2022b	O j	Andersson, S.	2022JDSO...18..207A
OCC2022b		JDSO 18, 207, 2022
OCC2022c	O j	Klos, O.	2022JDSO...18..210K
OCC2022c		JDSO 18, 210, 2022
OCC2023a	O j	Bardecker, J.	2023JDSO...19...59B
OCC2023a		JDSO 19, 59, 2023

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33			0			6.50	6.50			183754.43-212351.2
18379-2124	OCC 33		1925	0	-1	0.1	6.50	6.50	kA9hA7V..		183754.43-212351.2

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

WDS 18379-2124 OCC 33 (HD 171856) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18379-2124 OCC 33 (HD 171856) : MEASURES

No records found.

WDS 18379-2124 (HD 171856) : 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 18379-2124 (HD 171856) : ALADIN DSS IMAGE @ 18^h 37^m 54.43^s -21° 23' 51.2"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18379-2124 OCC 33 (HD 171856) : 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		18379-2124	OCC 33		-1	0.1
Show		18375-2130	ARA1548		336	14.8	9
Show		18387-2114	ARA1551		137	6.1	16
Show		18385-2110	B 1888		302	4.8	16
Show		18365-2128	ARA1547		230	11.0	21
Show		18378-2103	ARA1549		188	14.1	21
Show		18389-2103	WSI 90	AB	138	0.0	25
Show		18389-2103	TNN 11	AC	340	5.0	25
Show		18389-2103	TNN 11	AD	30	6.4	25
Show		18386-2149	J 1633	AB	143	36.8	28
Show		18386-2149	J 1633	BC	149	7.5	28
Show		18395-2101	RST5121	AB	21	4.2	32
Show		18395-2101	HJ 2833	AC	314	21.8	32
Show		18381-2156	ARA1895		26	16.0	32
Show		18360-2146	ARA1545		203	12.9	35
Show		18354-2118	ARA1544		180	6.1	35
Show		18406-2115	ARA1552		287	12.6	39
Show		18361-2154	ARA1546		173	10.4	40
Show		18398-2052	OCC1078		-1	0.7	42
Show		18352-2140	HU 246		68	2.6	42
Show		18407-2139	RST5122		189	2.1	43
Show		18372-2039	DON 914		174	0.4	48
Show		18393-2038	ARA1156		16	15.8	51
Show		18416-2108	KPP 422		299	4.7	54
Show		18353-2205	WNO 22		269	11.4	55
Show		18405-2040	OCC1079		-1	0.0	57
Show		18338-2119	ARA1543		253	8.5	59
Show		18337-2132	ARA1542		114	11.6	59
Show		18391-2025	ARA1155		238	11.6	62
Show		18406-2034	OCC1080		-1	0.0	63
Show		18386-2020	DON 917		51	1.1	65
Show		18367-2019	HO 567		165	1.3	68
Show		18337-2048	ARA1154		288	7.2	70
Show		18324-2138	ARA1541		349	7.1	78
Show		18406-2016	ARA1157		356	9.5	79
Show		18431-2051	ARA1159		84	11.7	80
Show		18377-2243	ARA1894		270	7.3	80
Show		18377-2244	ARA1893		137	12.5	81
Show		18336-2030	DON 911		348	2.1	82
Show		18439-2130	KPP4118		341	3.9	85
Show		18411-2236	ARA1896		327	12.3	86
Show		18397-2249	SHN 231		-1	0.1	89
Show		18314-2124	ARA1539		4	5.0	91
Show		18315-2138	ARA1540		10	14.8	91
Show		18321-2040	ARA1152		134	14.5	93
Show		18328-2022	KPP 416		159	4.9	95
Show		18407-1957	ARA1158		68	6.6	96
Show		18390-2259	ARA2241		114	7.3	97
Show		18362-1950	ARA 756		325	9.5	97
Show		18433-2225	I 1381		37	1.3	97
Show		18317-2211	ARA1890		289	11.5	98

WDS 18379-2124 : COMPONENTS

	A
B	pa=0.0° sep=0.00"

18379-2124 A

Componente originario normalizzato	AB	Name	HD 171856	Coord arcsec 2000	183754.43-212351.2	Mag	6.5
Spectral class	kA9hA7V..	PmRA	-2.00	PmDE	-66.0	SAO	187071
HIP	91347	Tycho2	6279-01724-1	HD	171856	HR	6988
GC	25450	BD	BD-21 5076	FK5	1485

Tycho2

Tycho2	6279-01724-1	Pflag		RAmdeg	279.47677561	DEmdeg	-21.39772484
PmRA	-2.0	PmDE	-66.2	E RAmdeg	4	E DEmdeg	4
E pmRA	0.7	E pmDE	0.7	EpRAm	1991.05	EpDEm	1991.02
Num	28	Q RAmdeg	0.8	Q DEmdeg	0.8	Q pmRA	0.9
Q pmDE	0.7	BTmag	6.159	E BTmag	0.015	VTmag	5.955
E VTmag	0.010	Prox	999	TYC	T	HIP	91347
CCDM		RAdeg	279.47678028	DEdeg	-21.39757167	EpRA 1990	1.79
EpDE 1990	1.66	E RAdeg	3.7	E DEdeg	4.3	Posflg
Corr	0.1

SAO

SAO	187071	DelFlag		RA1950		PmRA1950	0
DE1950		PmDE1950	-0.068	Vmag	5.8	SpType	A5
Double code		Source	74	CatNum	1485	DM	BD-21 5076
DMcomp		BDsup		HD	171856	M HD	0
GC	25450	RA1950rad	4.86472507	DE1950rad	-0.37421353	PmRA2000	0.0001
PmDE2000	-0.067

Hipparcos

Catalog	H	HIP	91347	Proxy		RAhms	18 37 54.43
DEdms	-21 23 51.2	Vmag	5.93	VarFlag		R Vmag	G
RAdeg	279.477	DEdeg	-21.3976	AstroRef		Plx	10.38
CCDM		N CCDM		Nsys		Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	171856	BD	BD-21 5076
CD		CP		Dm number	-21 5076	VIred	0.21
SpType	A5IV	R SpType		Coord arcsec 2000	183754.43-212351.2

Hipparcos 2

HIP	91347	Sn	5	So	0	Nc	1
RArad	4.8777900307	DErad	-0.3734579626	Plx	9.58	PmRA	-1.36
PmDE	-66.25	E RArad	0.4	E DErad	0.27	E Plx	0.44
E pmRA	0.59	E pmDE	0.38	Hpmag	5.9952	E Hpmag	0.0009
SHp	0.005	VA	0	BV	0.189	E BV	0.003
VI	0.21

18379-2124 B

Componente originario normalizzato

Coord arcsec 2000

183754.43-212351.2

Mag

6.5

Calc coord

yes