21287+4952 STF 2800

21^h 28^m 43.09^s +49° 52' 06.6" P.A. 254.00 sep 9.1 mag 9.50,10.41 Sp A5 dist. 444.44 pc (1449.76 l.y.)

Coord 2000	21287+4952	Discov num	STF2800	Comp		Coord arcsec 2000	21 28 43.09 +49 52 06.6
Date first	1828	Date last	2019	Obs	20
Pa first	261	Pa last	253.5	P.A. Now (θ)	253.5°
Sep first	9.0	Sep last	9.133	Sep. Now (ρ)	9.133"
Mag pri	9.50	Mag sec	10.41	delta mag (ΔM)	0.91	Spectral class	A5 (white)
Pri motion ra	+009	Sec motion ra	+012
Pri motion dec	+006	Sec motion dec	+007
Notes

rPM=0.228 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		HIP	106038		Tycho2	3598-01851-1		Gaia DR2	2170975852112895616
BD	BD+49 3533		Distance	444.44		Distance ly	1449.76

WDS 21287+4952 STF 2800 : NOTES

No records found.

REFERENCES

refcode	metd	author	reference
STFA		(F. Struve DD - Appendix list #1)	...................
STFB		(F. Struve DD - Appendix list #2)	...................
StF1833A	Ma -	Struve, F.G.W.	1833MmRAS...5...13H
StF1833A	+Mc	cited by Herschel (MemRAS 5, 13, 1833)
StF1833B	Ma -	Struve, F.G.W.	1833AN.....10..389B
StF1833B		cited by Bessel (AN 10, 389, 1833)
StF1837	Ma -	Struve, F.G.W.	1837AN.....14...249
StF1837		Stellarum duplicium et multiplicium mensurae micrometricae...
StF1837		(Dorpat, Academiae scientiarum caesareae petropolitaneifique), 1837
StF1844A	Ma -	Struve, F.G.W.	1844QB43.S66.......
StF1844A		cited by Smyth (Cycle of Celestial Objects 2, 1844)
StF1852A	Ma -	Struve, F.G.W.	.
StF1852A		cited by Bishop (Bishop Obs. Astron. Observations 1852)
StF1865A	Ma -	Struve, F.G.W.	1865AN.....64...81E
StF1865A		cited by Engelmann (AN 64, 81, #1518, 1865)
StF1875A	Ma -	Struve, F.G.W.	1875AN.....85..323D
StF1875A		cited by Doberck, 1875 (see Dob1875b,f,g,h)
StF1878	Ma -	Struve, F.G.W.	.
StF1878		Pulkova Observations 9, 1878
StF1878B	Ma -	Struve, F.G.W.	1878Obs.....2..239G
StF1878B		cited by Gledhill (Obs 2, 239, 1878)
StF1880A	Ma -	Struve, F.G.W.	1880Obs.....3..535G
StF1880A		cited by Gledhill (Obs 3, 535, 1880)
StF1906A	Ma -	Struve, F.G.W.	1906QB821.B972.....
StF1906A		cited in BDS (Burnham Double Star Cat.), 1906
StF1906B	Ma -	Struve, F.G.W.	1906MmRAS..56....1L
StF1906B		cited by Lewis (MemRAS 56, 1, 1906)
StF1922A	Ma -	Struve, F.G.W.	1922AN....216...49R
StF1922A		cited by Rabe (AN 216, 49, 1922)
StF1932A	Ma -	Struve, F.G.W.	1932QB821.A43......
StF1932A		cited in ADS (Aitken Double Star Cat.), 1932
StF2002	- -	Weis, J.
StF2002		F. G. W. Struve's double stars : the Dorpat catalogue; the Pulkovo catalogue
StF2002		USNO Library : QB 821 .S8 W49 2002
StF2022	- -	email note from Jan Weis: 6 July 2022
StF9999	Ma -	Struve, F.G.W.	...................
StF9999		Unpublished, manuscript or reference not found.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21287+4952	STF2800		2004	15	254	8.9	9.50	10.41	A5	D	212843.09+495206.6
21287+4952	STF2800		2010	18	249	9.0	9.50	10.41	A5		212843.09+495206.6
21287+4952	STF2800		2012	19	233	10.6	9.50	10.41	A5		212843.09+495206.6
21287+4952	STF2800		2018	19	254	9.3	9.50	10.41	A5		212843.09+495206.6
21287+4952	STF2800		2019	20	254	9.1	9.50	10.41	A5		212843.09+495206.6

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

WDS 21287+4952 STF 2800 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21287+4952 STF 2800 : MEASURES

No records found.

WDS 21287+4952 : VIRTUAL EYEPIECE

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

WDS 21287+4952 : ALADIN DSS IMAGE @ 21^h 28^m 43.09^s +49° 52' 06.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21287+4952 STF 2800 : 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		21287+4952	STF2800		254	9.1
Show		21279+4938	KPP2392		33	20.6	17
Show		21296+5010	KPP 877		16	7.4	20
Show		21260+4950	HDS3051		213	0.2	27
Show		21311+5008	HU 593		60	1.5	28
Show		21304+4926	TDT3002		311	1.7	31
Show		21329+4959	CHR 102	AB	211	0.0	42
Show		21329+4959	RBR 52	AB,C	37	3.8	42
Show		21265+4917	ES 823		280	11.1	42
Show		21331+5001	CLZ 81	AB	324	68.6	43
Show		21331+5001	RAO 460	AC	331	1.2	43
Show		21320+5023	TDS1133		309	1.1	44
Show		21248+5015	HJ 1645		36	8.1	44
Show		21264+4911	ES 822		24	1.4	47
Show		21249+4919	ES 2710		157	20.1	50
Show		21260+4905	ES 821		276	7.0	54
Show		21238+4926	HJ 1643		23	27.7	55
Show		21246+5033	TDT2947		262	0.7	58
Show		21342+5026	CVR 250		114	119.7	63
Show		21306+4852	OSO 148	AB	170	16.1	63
Show		21306+4852	OSO 148	AC	119	23.8	63
Show		21306+4852	OSO 148	AD	346	18.6	63
Show		21235+5031	HLD 44		258	2.1	64
Show		21342+5029	ES 33		69	4.2	65
Show		21314+4853	SWN 4		56	0.9	65
Show		21225+4929	HDS3043		113	0.2	65
Show		21300+4848	SWN 2		352	3.1	66
Show		21352+5022	IPH 29		260	15.8	70
Show		21323+5054	TDT3019		82	0.7	71
Show		21339+5045	HDS3070		347	5.4	73
Show		21326+4850	SWN 9		258	15.4	73
Show		21212+5001	KPP4235	AB	90	2.8	74
Show		21332+4853	TDT3028		126	0.7	74
Show		21295+4836	SWN 1		2	5.3	77
Show		21295+5111	SKF 57		232	4.5	80
Show		21362+5030	HJ 1669		236	19.8	81
Show		21370+4941	LEO 28		155	2.5	82
Show		21304+4832	SWN 3		142	1.0	82
Show		21254+5108	SKF2530		101	8.1	83
Show		21207+4923	ES 820	BC	293	3.7	83
Show		21207+4923	ES 820	AB	60	35.5	84
Show		21252+5110	CBL 92		342	9.1	85
Show		21340+5100	COU2546		178	0.8	85
Show		21308+4827	A 770	DE	41	7.2	86
Show		21339+4842	SWN 7		313	1.9	87
Show		21308+4827	A 770	AB	143	0.1	88
Show		21308+4827	A 770	AB,C	317	1.1	88
Show		21308+4827	A 770	AB,D	15	98.9	88
Show		21203+4921	BU 839	AC	200	22.5	88
Show		21203+4921	BU 839	AB	207	14.5	88
Show		21203+4921	BU 839	CB	7	8.1	88

WDS 21287+4952 : COMPONENTS

	A
B	pa=245.3° sep=6.21"

21287+4952 A

Componente originario normalizzato	AB	Coord arcsec 2000	212843.09+495206.6	Mag	9.5	Spectral class	A5 (white)
PmRA	9.00	PmDE	6.0	HIP	106038	Tycho2	3598-01851-1
BD	BD+49 3533

Tycho2

Tycho2	3598-01851-1	Pflag		RAmdeg	322.17952644	DEmdeg	49.86849727
PmRA	14.6	PmDE	5.8	E RAmdeg	13	E DEmdeg	15
E pmRA	1.5	E pmDE	1.5	EpRAm	1990.83	EpDEm	1990.50
Num	5	Q RAmdeg	0.8	Q DEmdeg	0.6	Q pmRA	0.8
Q pmDE	0.7	BTmag	9.818	E BTmag	0.024	VTmag	9.497
E VTmag	0.022	Prox	89	TYC	T	HIP	106038
CCDM	A	RAdeg	322.17947444	DEdeg	49.86848389	EpRA 1990	1.77
EpDE 1990	1.76	E RAdeg	12.9	E DEdeg	14.5	Posflg
Corr	0.0

Hipparcos

Catalog	H	HIP	106038	Proxy	H	RAhms	21 28 43.07
DEdms	+49 52 06.5	Vmag	9.09	VarFlag		R Vmag	H
RAdeg	322.179	DEdeg	49.8685	AstroRef	A	Plx	1.82
CCDM	21287+4952	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	254	Rho	9.086	HD		BD	BD+49 3533
CD		CP		Dm number	+49 3533	VIred	0.18
SpType	A5...	R SpType		Coord arcsec 2000	212843.07+495206.5

Hipparcos 2

HIP	106038	Sn	15	So	3	Nc	2
RArad	5.6230925006	DErad	0.8703692127	Plx	-2.25	PmRA	12.22
PmDE	9.95	E RArad	1.15	E DErad	1.02	E Plx	1.34
E pmRA	1.45	E pmDE	1.35	Hpmag	9.1748	E Hpmag	0.0039
SHp	0.039	VA	0	BV	0.324	E BV	0.035
VI	0.38

CCDM

Ccdm	21287+4952	RComp		Comp	A	Note1
Note2		Discov num		DRAs	1.19	DDEs	7.5
R dRAs	10	Year		Theta		Rho
Obs	2	Vmag	9.5	Sp		PmNote	*
PmRA	26	PmDE	21	Dm number	+49 3533	Cat1	BD
Name2	+49 1807	Cat2	AGK2/3	HD		M HD
ADS BDS	A15030	M ADS BDS		N IDS		IDS	21252N4926A
HIC	106038

21287+4952 B

Componente originario normalizzato	AB		Coord arcsec 2000	212842.51+495204.0		Mag	10.41		PmRA	12.00
PmDE	7.0		Tycho2	3598-02173-1		Calc delta mag	0.91		Calc coord	yes

Tycho2

Tycho2	3598-02173-1	Pflag	P	RAmdeg	322.17574778	DEmdeg	49.86790927
PmRA	14.6	PmDE	9.3	E RAmdeg	31	E DEmdeg	32
E pmRA	3.3	E pmDE	3.0	EpRAm	1990.75	EpDEm	1990.43
Num	3	Q RAmdeg	0.2	Q DEmdeg	0.7	Q pmRA	0.2
Q pmDE	0.7	BTmag	10.945	E BTmag	0.055	VTmag	10.405
E VTmag	0.045	Prox	17	TYC	T	HIP	106038
CCDM	B	RAdeg	322.17570139	DEdeg	49.86780167	EpRA 1990	1.75
EpDE 1990	1.75	E RAdeg	30.8	E DEdeg	31.9	Posflg	D
Corr	0.1

CCDM

Ccdm	21287+4952	RComp		Comp	B	Note1
Note2		Discov num	STF2800	DRAs	0.29	DDEs	5.1
R dRAs	90	Year	1832	Theta	256	Rho	9.1
Obs	4	Vmag	11.0	Sp		PmNote
PmRA	26	PmDE	21	Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A15030	M ADS BDS		N IDS		IDS	21252N4926B
HIC	106038