21045+7046 STF 2771

21^h 04^m 28.70^s +70° 45' 49.9" P.A. 33.00 sep 2.7 mag 9.53,9.61 Sp K2

Coord 2000	21045+7046	Discov num	STF2771	Comp		Coord arcsec 2000	21 04 28.70 +70 45 49.9
Date first	1831	Date last	2019	Obs	40
Pa first	31	Pa last	32.6	P.A. Now (θ)	32.6°
Sep first	2.5	Sep last	2.69	Sep. Now (ρ)	2.69"
Mag pri	9.53	Mag sec	9.61	delta mag (ΔM)	0.08	Spectral class	K2 (yellow-orange)
Pri motion ra	+083	Sec motion ra	+105
Pri motion dec	-001	Sec motion dec	+024
Notes

rPM=0.309

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cepheus

Tycho2

4464-01941-2

Gaia DR2

2271718154018913664

WDS 21045+7046 STF 2771 : 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
21045+7046	STF2771		1999	31	32	2.7	9.53	9.61	K2		210428.70+704549.9
21045+7046	STF2771		2008	32	33	2.7	9.53	9.61	K2		210428.70+704549.9
21045+7046	STF2771		2010	33	34	2.6	9.53	9.61	K2		210428.70+704549.9
21045+7046	STF2771		2016	33	34	2.7	9.53	9.61	K2		210428.70+704549.9
21045+7046	STF2771		2019	39	33	2.7	9.53	9.61	K2		210428.70+704549.9

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

WDS 21045+7046 STF 2771 : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 21045+7046 STF 2771 : MEASURES

No records found.

WDS 21045+7046 : VIRTUAL EYEPIECE

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

WDS 21045+7046 : ALADIN DSS IMAGE @ 21^h 04^m 28.70^s +70° 45' 49.9"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 21045+7046 STF 2771 : 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		21045+7046	STF2771		33	2.7
Show		21115+7050	HDS3019	AB	136	0.3	36
Show		21059+7124	LDS1945		353	15.9	39
Show		21078+7123	HDS3012		190	0.9	41
Show		20561+7052	TDT2640		318	0.7	42
Show		21027+7005	TDT2710		42	0.4	43
Show		21050+7000	LDS1944		349	48.0	46
Show		20571+7138	TDT2652		307	0.6	63
Show		21052+6942	MLB 303			6.1	64
Show		21114+7140	OSO 143		277	16.6	64
Show		21069+6940	LAF 63	AB	201	3.7	67
Show		21069+6940	LAF 63	AC	259	8.4	67
Show		21069+6940	LAF 63	AD	332	14.5	67
Show		21148+7003	MLB 364		59	5.2	68
Show		20544+6957	A 1216	CD	82	0.9	71
Show		20544+6957	A 1216	AB	327	20.1	71
Show		20544+6957	A 1216	AC	346	38.6	71
Show		21201+7112	HJ 3027		128	34.2	79
Show		20493+7131	MLB 422		203	5.5	87
Show		20465+7036	MLB 363		211	3.2	90
Show		21001+6917	TDT2686		42	2.4	92
Show		20592+7224	MLB 423		247	5.9	101
Show		21209+6944	MLB 365		47	5.1	104
Show		20454+7000	MLR 93		210	0.1	107
Show		20458+7146	SKF1249		281	39.0	109
Show		21195+6928	MLB 304		47	5.2	109
Show		20520+6910	JOD 19		172	0.5	116
Show		21233+7207	LSC 98		222	0.1	122
Show		20458+7219	MLB 421		251	1.9	128
Show		21012+7258	A 880		43	0.3	134
Show		20515+7304	LDS1941		234	1.6	151
Show		21220+7257	TDT2926		74	0.6	155
Show		21157+6821	BVD 135		310	24.9	157
Show		21016+6810	LI 6	AB	168	2.5	157
Show		21176+6818	YUN 1	AB	92	9.0	164
Show		21176+6818	CON 40	CD	69	1.0	164
Show		21122+6803	KPP4227	AB	298	1.9	168
Show		21113+7334	CRB 209		143	22.0	171
Show		21087+7342	OSO 141		156	14.7	178
Show		20464+7332	TDS1099		336	1.2	186
Show		21225+6751	TDT2933		157	0.6	200
Show		21112+7404	STF2784		345	14.3	200
Show		21022+6723	KPP4220		302	1.2	204
Show		21138+7409	CBL 91		168	32.7	208
Show		20597+7417	A 879		138	4.4	213
Show		21158+6721	STF2788		352	8.1	214
Show		21002+7432	CBL 530		285	48.6	228
Show		20509+6708	MLB 301		333	4.9	230
Show		20465+6717	MLR 73		37	6.3	231
Show		20485+7429	MLR 238		20	0.2	235
Show		20517+6701	MLB 302		324	4.9	236

WDS 21045+7046 : COMPONENTS

	A
B	pa=11.9° sep=2.32"

21045+7046 A

Componente originario normalizzato	AB		Coord arcsec 2000	210428.70+704549.9		Mag	9.53		Spectral class	K2 (yellow-orange)
PmRA	83.00		PmDE	-1.0

CCDM

Ccdm	21045+7046	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-1.00	DDEs	-8.7
R dRAs	12	Year		Theta		Rho
Obs	2	Vmag	9.3	Sp	A0	PmNote
PmRA	8	PmDE	-17	Dm number	+70 1161	Cat1	BD
Name2	+70 731	Cat2	AGK2/3	HD		M HD
ADS BDS	A14630	M ADS BDS		N IDS		IDS	21037N7022A
HIC

21045+7046 B

Componente originario normalizzato	AB		Coord arcsec 2000	210428.80+704552.2		Mag	9.61		PmRA	105.00
PmDE	24.0		Tycho2	4464-01941-1		Calc delta mag	0.08		Calc coord	yes

Tycho2

Tycho2	4464-01941-1	Pflag		RAmdeg	316.12162602	DEmdeg	70.76453839
PmRA	104.6	PmDE	23.6	E RAmdeg	14	E DEmdeg	16
E pmRA	1.7	E pmDE	1.8	EpRAm	1991.02	EpDEm	1990.76
Num	3	Q RAmdeg	0.3	Q DEmdeg	0.9	Q pmRA	0.3
Q pmDE	0.9	BTmag	10.071	E BTmag	0.028	VTmag	9.610
E VTmag	0.024	Prox	27	TYC	T	HIP
CCDM		RAdeg	316.12089750	DEdeg	70.76448361	EpRA 1990	1.74
EpDE 1990	1.64	E RAdeg	14.1	E DEdeg	15.7	Posflg	D
Corr	0.0

CCDM

Ccdm	21045+7046	RComp		Comp	B	Note1
Note2		Discov num	STF2771	DRAs		DDEs
R dRAs		Year	1832	Theta	213	Rho	2.7
Obs	14	Vmag	9.3	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A14630	M ADS BDS		N IDS		IDS	21037N7022B
HIC