20047+6353 STF 2640 AC

20^h 04^m 44.51^s +63° 53' 24.4" P.A. 81.00 sep 153.0 mag 6.29,11.42 Sp A2II-III dist. 79.18 pc (258.29 l.y.)

Coord 2000	20047+6353	Discov num	STF2640	Comp	AC	Coord arcsec 2000	20 04 44.51 +63 53 24.4
Date first	1880	Date last	2003	Obs	9
Pa first	81	Pa last	80.8	P.A. Now (θ)	80.8°
Sep first	153.4	Sep last	153.025	Sep. Now (ρ)	153.025"
Mag pri	6.29	Mag sec	11.42	delta mag (ΔM)	5.13	Spectral class	A2II-III (white)
Pri motion ra	+003	Sec motion ra	+000
Pri motion dec	+038	Sec motion dec	+015
Notes

rPM=0.608

Nature of this double is uncertain.

20047+6353 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 191174	18692	20 04 45 +63 53 24	STF 2640 AB	2019	78	14	5.7	6.29	9.54	3.25
Show		18692	20 04 45 +63 53 24	STF 2640 AC	2003	9	81	153.0	6.29	11.42	5.13		<===

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Draco	SAO	18692	HIP	98872	Tycho2	4240-01067-1
Gaia DR2	2244320802453812992	HD	191174	HR	7695	ADS	13371
BD	BD+63 1593	Distance	79.18	Distance ly	258.29

WDS 20047+6353 STF 2640 AC : 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
20047+6353	STF2640	AC	1999	8	81	153.1	6.29	11.42		D	200444.51+635324.4
20047+6353	STF2640	AC	2003	9	81	153.0	6.29	11.42		D	200444.51+635324.4

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

WDS 20047+6353 STF 2640 AC : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20047+6353 STF 2640 AC : MEASURES

No records found.

WDS 20047+6353 : 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 20047+6353 : ALADIN DSS IMAGE @ 20^h 04^m 44.51^s +63° 53' 24.4"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20047+6353 STF 2640 AC : 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		20047+6353	STF2640	AB	14	5.7	1
Show		20047+6353	STF2640	AC	81	153.0	1
Show		20052+6346	BU 470		210	2.6	9
Show		20056+6342	STF2642	AB	191	1.8	13
Show		20056+6342	STF2642	AC	34	68.6	13
Show		20035+6412	TDT1939		330	0.8	21
Show		20034+6330	STF2632		299	26.2	26
Show		20085+6346	STI 947		320	11.1	26
Show		20012+6409	UC 4066		95	15.8	29
Show		20086+6328	STI 948		321	17.9	37
Show		20010+6323	STI 940		69	14.1	40
Show		20042+6434	BU 1479		46	43.0	41
Show		20102+6419	STI 950		200	6.5	44
Show		20023+6438	STTA200	AB	332	98.9	48
Show		20023+6438	STTA200	AC	190	27.0	48
Show		19579+6326	HU 955		338	3.0	53
Show		19567+6347	DAM 311		70	9.5	54
Show		19567+6346	VAT 5		215	6.4	54
Show		19582+6430	UC 4059		43	8.6	57
Show		19563+6337	UC 4055		134	61.1	59
Show		20137+6353	LDS2449		165	24.9	60
Show		20015+6449	H 6 38	AB	171	193.1	60
Show		20119+6431	STF2660		166	22.3	60
Show		19579+6258	HJ 2923	AB	351	28.5	61
Show		19546+6408	AG 394		274	22.1	69
Show		20142+6429	STI 958		6	7.3	72
Show		19545+6330	STI 935		31	11.0	72
Show		19579+6258	BU 9035	CD	237	47.2	73
Show		20154+6412	MLR 60	AB	173	0.2	73
Show		20154+6412	LDS5245	AC	122	20.0	73
Show		20154+6412	SHY 772	AD	247	999.9	73
Show		19530+6352	HU 954		214	0.1	78
Show		19573+6253	HDS2841		21	0.1	79
Show		20074+6511	HJL1102		123	126.7	80
Show		19528+6411	STF2604		182	28.0	81
Show		19528+6337	MLR 51		243	1.3	81
Show		20023+6515	STI 941		96	11.7	83
Show		20171+6410	STI 961		179	6.7	84
Show		20178+6343	STI 962		182	14.9	88
Show		20043+6225	STI 943		78	13.5	89
Show		20081+6227	STI 946		302	5.3	90
Show		19510+6353	UC 4038		338	11.4	91
Show		20080+6225	BVD 335		39	9.7	92
Show		19508+6400	STI 931		19	15.9	92
Show		19506+6359	TDT1797		168	0.8	94
Show		20129+6236	STI 954		286	9.4	96
Show		20067+6214	TOR 22		316	14.9	99
Show		20097+6220	ES 1853		293	4.3	100
Show		20030+6215	STI 942		93	9.4	100
Show		20014+6217	MLR 13		231	0.3	100
Show		19547+6240	UC 4052		95	85.4	100

WDS 20047+6353 : COMPONENTS

	A	B
B	pa=6.1° sep=5.60"
C	pa=69.8° sep=70.83"	pa=74.0° sep=68.53"

20047+6353 A

Name	HD 191174	Coord arcsec 2000	200444.51+635324.4	Mag	6.29	Spectral class	A2II (white)
PmRA	3.00	PmDE	38.0	SAO	18692	HIP	98872
Tycho2	4240-01067-1	HD	191174	HR	7695	GC	27894
ADS	13371	BD	BD+63 1593

Tycho2

Tycho2	4240-01067-1	Pflag		RAmdeg	301.18550993	DEmdeg	63.89019543
PmRA	5.3	PmDE	32.5	E RAmdeg	4	E DEmdeg	4
E pmRA	1.3	E pmDE	1.4	EpRAm	1991.50	EpDEm	1991.62
Num	10	Q RAmdeg	1.2	Q DEmdeg	1.8	Q pmRA	1.2
Q pmDE	1.8	BTmag	6.356	E BTmag	0.014	VTmag	6.291
E VTmag	0.010	Prox	56	TYC	T	HIP	98872
CCDM	A	RAdeg	301.18548167	DEdeg	63.89012083	EpRA 1990	1.71
EpDE 1990	1.76	E RAdeg	3.6	E DEdeg	3.6	Posflg
Corr	0.0

SAO

SAO	18692	DelFlag		RA1950		PmRA1950	0.0006
DE1950		PmDE1950	0.046	Vmag	6.2	SpType	A2
Double code		Source	70	CatNum	27894	DM	BD+63 1593
DMcomp		BDsup		HD	191174	M HD	0
GC	27894	RA1950rad	5.25395591	DE1950rad	1.11257891	PmRA2000	0.0011
PmDE2000	0.043

Hipparcos

Catalog	H	HIP	98872	Proxy	H	RAhms	20 04 44.51
DEdms	+63 53 24.4	Vmag	6.24	VarFlag		R Vmag	H
RAdeg	301.185	DEdeg	63.8901	AstroRef	A	Plx	12.74
CCDM	20048+6353	N CCDM	I	Nsys	1	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	16	Rho	5.595	HD	191174	BD	BD+63 1593
CD		CP		Dm number	+63 1593	VIred	0.06
SpType	A2II-III	R SpType		Coord arcsec 2000	200444.51+635324.4

Hipparcos 2

HIP	98872	Sn	15	So	3	Nc	2
RArad	5.2566782535	DErad	1.1150928927	Plx	12.63	PmRA	2.97
PmDE	37.29	E RArad	0.32	E DErad	0.34	E Plx	0.36
E pmRA	0.33	E pmDE	0.4	Hpmag	6.2757	E Hpmag	0.0006
SHp	0.007	VA	0	BV	0.1	E BV	0.006
VI	0.11

20047+6353 B

Coord arcsec 2000	200444.60+635330.0		Mag	9.54		Spectral class	III		PmRA	3.00
PmDE	38.0		Calc delta mag	3.25		Calc coord	yes

20047+6353 C

Coord arcsec 2000	200454.58+635348.9		Mag	11.42		Spectral class	III		PmRA	0.00
PmDE	15.0		Calc delta mag	5.13		Calc coord	yes