18439-1954 STN 44 (HD 172987)

18^h 43^m 56.52^s -19° 53' 29.9" P.A. 316.00 sep 1.6 mag 9.05,9.13 Sp K0V

Coord 2000	18439-1954	Discov num	STN 44	Comp		Coord arcsec 2000	18 43 56.52 -19 53 29.9
Date first	1877	Date last	2017	Obs	36
Pa first	285	Pa last	315.5	P.A. Now (θ)	315.5°
Sep first	1.7	Sep last	1.606	Sep. Now (ρ)	1.606"
Mag pri	9.05	Mag sec	9.13	delta mag (ΔM)	0.08	Spectral class	K0V (yellow-orange)
Pri motion ra	+063	Sec motion ra	+063
Pri motion dec	-016	Sec motion dec	-016
Notes

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 172987		Constellation	Sagittarius		SAO	161773		Tycho2	6288-00925-2
Gaia DR2	4080221546859834624		HD	172987

WDS 18439-1954 STN 44 (HD 172987) : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
Stn1877	Ma j	Stone, O.	1877PCinO...3....1S
Stn1877		Pub. Cincinnati Obs. #3, 1877
Stn1878	Ma -	Stone, O.	1878PCinO...4....1.
Stn1878		Pub. Cincinnati Obs. #4, 1878
Stn1879	Ma j	Stone, O.	1879PCinO...5....1S
Stn1879		Pub. Cincinnati Obs. #5, 1879
Stn1880A	Ma -	Stone, O.	1880Obs.....3..314G
Stn1880A		cited by Gledhill (Obs 3, 314, 1880)
Stn1882	Ma -	Stone, O.	1882PCinO...6....1S
Stn1882		Pub. Cincinnati Obs. #6, 1882
Stn1890	Ma j	Stone, O.	1890PCinO..10....1.
Stn1890		Pub. Cincinnati Obs. #10, 1890
Stn1906A	Ma -	Stone, O.	1906MmRAS..56....1L
Stn1906A		cited by Lewis (MemRAS 56, 1, 1906)
Stn1932A	Ma -	Stone, O.	1932QB821.A43......
Stn1932A		cited in ADS (Aitken Double Star Cat.), 1932

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
18439-1954	STN 44		2002	33	313	1.6	9.05	9.13	K0V	D	184356.52-195329.9
18439-1954	STN 44		2008	34	314	1.7	9.05	9.13	K0V		184356.52-195329.9
18439-1954	STN 44		2017	35	316	1.6	9.05	9.13	K0V		184356.52-195329.9

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

WDS 18439-1954 STN 44 (HD 172987) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 18439-1954 STN 44 (HD 172987) : MEASURES

No records found.

WDS 18439-1954 (HD 172987) : VIRTUAL EYEPIECE

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Pass over with the mouse cursor to display the catalog designation.

WDS 18439-1954 (HD 172987) : ALADIN DSS IMAGE @ 18^h 43^m 56.52^s -19° 53' 29.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 18439-1954 STN 44 (HD 172987) : NEIGHBORHOODS

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Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show		18439-1954	STN 44		316	1.6
Show		18441-1954	ARA1160		184	8.4	3
Show		18436-2013	DON 920		336	1.4	20
Show		18425-1943	ARA 761		242	6.9	24
Show		18429-1917	OCC9184		-1	0.1	40
Show		18465-1940	BRT1543		258	3.3	40
Show		18407-1957	ARA1158		68	6.6	45
Show		18412-1928	OCC9183		-1	0.2	47
Show		18453-2039	EVS 37	AB	128	3.1	50
Show		18453-2039	EVS 37	AC	67	10.8	50
Show		18453-2039	EVS 37	AD	156	10.6	50
Show		18453-2039	EVS 37	AE	271	11.5	50
Show		18453-2039	EVS 37	AF	330	18.2	50
Show		18453-2039	GAA 14	Aa,Ab	349	0.0	50
Show		18453-2039	KRV 18	AG	250	29.9	50
Show		18453-2039	KRV 18	AH	304	34.9	50
Show		18406-2016	ARA1157		356	9.5	52
Show		18418-1909	J 2221	AB	254	7.5	55
Show		18418-1909	J 2221	AC	346	17.9	55
Show		18431-2051	ARA1159		84	11.7	59
Show		18470-1912	HJ 2837		89	11.2	61
Show		18462-2046	I 1030		161	5.9	62
Show		18406-2034	OCC1080		-1	0.0	63
Show		18483-1935	B 2461		197	6.7	64
Show		18479-1936	J 1657		28	3.6	65
Show		18405-2040	OCC1079		-1	0.0	68
Show		18483-2033	DON 924		53	1.2	74
Show		18391-2025	ARA1155		238	11.6	76
Show		18388-1928	BRT1541		34	4.2	78
Show		18393-2038	ARA1156		16	15.8	80
Show		18386-2020	DON 917		51	1.1	80
Show		18416-2108	KPP 422		299	4.7	82
Show		18398-2052	OCC1078		-1	0.7	83
Show		18452-2117	ARA1553		273	10.1	85
Show		18497-2019	SEE 362			13.8	85
Show		18429-1829	ARA 488		167	20.8	86
Show		18393-1859	ARA 760		60	5.6	87
Show		18500-1933	KPP4124		15	1.5	89
Show		18474-2108	B 1889		218	0.8	89
Show		18496-1909	OCC 455	AB	-1	0.2	92
Show		18395-2101	RST5121	AB	21	4.2	93
Show		18395-2101	HJ 2833	AC	314	21.8	93
Show		18406-2115	ARA1552		287	12.6	94
Show		18388-1853	FEN 33		248	2.6	96
Show		18439-2130	KPP4118		341	3.9	97
Show		18374-1917	ARA 758		270	9.1	100
Show		18496-1854	OCC 454		-1	0.1	100
Show		18389-2103	WSI 90	AB	138	0.0	100
Show		18389-2103	TNN 11	AC	340	5.0	100
Show		18389-2103	TNN 11	AD	30	6.4	100
Show		18510-1958	ARA1162	AB	290	10.3	101

WDS 18439-1954 : COMPONENTS

	A
B	pa=317.3° sep=1.56"

18439-1954 A

Componente originario normalizzato	AB	Name	HD 172987	Coord arcsec 2000	184356.52-195329.9	Mag	9.05
Spectral class	K0V (yellow-orange)	PmRA	63.00	PmDE	-16.0	SAO	161773
Tycho2	6288-00925-2	HD	172987	DM	BD-20 5244

Tycho2

Tycho2	6288-00925-2	Pflag	P	RAmdeg	280.98549109	DEmdeg	-19.89165106
PmRA	62.5	PmDE	-16.2	E RAmdeg	11	E DEmdeg	18
E pmRA	2.3	E pmDE	2.3	EpRAm	1991.48	EpDEm	1990.72
Num	6	Q RAmdeg	1.3	Q DEmdeg	2.6	Q pmRA	1.3
Q pmDE	2.7	BTmag	10.007	E BTmag	0.029	VTmag	9.049
E VTmag	0.020	Prox	17	TYC	T	HIP
CCDM		RAdeg	280.98551889	DEdeg	-19.89174889	EpRA 1990	1.88
EpDE 1990	1.78	E RAdeg	10.6	E DEdeg	17.5	Posflg	D
Corr	-0.3

SAO

SAO	161773	DelFlag		RA1950		PmRA1950	0.0045
DE1950		PmDE1950	-0.012	Vmag	8.5	SpType	G5
Double code		Source	23	CatNum	7863	DM	BD-20 5244
DMcomp		BDsup		HD	172987	M HD	0
GC		RA1950rad	4.89119203	DE1950rad	-0.34806694	PmRA2000	0.0046
PmDE2000	-0.011

18439-1954 B

Componente originario normalizzato	AB		Coord arcsec 2000	184356.44-195328.8		Mag	9.13		PmRA	63.00
PmDE	-16.0		Tycho2	6288-00925-1		Calc delta mag	0.08		Calc coord	yes

Tycho2

Tycho2	6288-00925-1	Pflag	P	RAmdeg	280.98549109	DEmdeg	-19.89165106
PmRA	62.5	PmDE	-16.2	E RAmdeg	11	E DEmdeg	18
E pmRA	2.3	E pmDE	2.3	EpRAm	1991.48	EpDEm	1990.72
Num	6	Q RAmdeg	1.3	Q DEmdeg	2.6	Q pmRA	1.3
Q pmDE	2.7	BTmag	10.132	E BTmag	0.033	VTmag	9.129
E VTmag	0.021	Prox	17	TYC	T	HIP
CCDM		RAdeg	280.98512306	DEdeg	-19.89145000	EpRA 1990	1.88
EpDE 1990	1.79	E RAdeg	11.7	E DEdeg	19.6	Posflg	D
Corr	-0.3