20507+8552 STF 2794 (HD 201748)

20^h 50^m 42.69^s +85° 52' 04.6" P.A. 90.00 sep 17.7 mag 8.54,10.88 Sp F0 dist. 240.96 pc (786.01 l.y.)

Coord 2000	20507+8552	Discov num	STF2794	Comp		Coord arcsec 2000	20 50 42.69 +85 52 04.6
Date first	1831	Date last	2015	Obs	16
Pa first	90	Pa last	90.1	P.A. Now (θ)	90.1°
Sep first	18.0	Sep last	17.732	Sep. Now (ρ)	17.732"
Mag pri	8.54	Mag sec	10.88	delta mag (ΔM)	2.34	Spectral class	F0 (yellow-white)
Pri motion ra	+013	Sec motion ra	+009
Pri motion dec	+016	Sec motion dec	+005
Notes

rPM=0.568

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 201748	Constellation	Cepheus	SAO	3488	HIP	102893
Tycho2	4653-00560-1	Gaia DR2	2304032152219117568	HD	201748	GC	29348
BD	BD+85 359	Distance	240.96	Distance ly	786.01

WDS 20507+8552 STF 2794 (HD 201748) : 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
20507+8552	STF2794		2000	8	89	17.9	8.54	10.88	F0	D	205042.69+855204.6
20507+8552	STF2794		2010	9	90	17.7	8.54	10.88	F0	D	205042.69+855204.6
20507+8552	STF2794		2015	13	90	17.7	8.54	10.88	F0		205042.69+855204.6

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

WDS 20507+8552 STF 2794 (HD 201748) : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 20507+8552 STF 2794 (HD 201748) : MEASURES

No records found.

WDS 20507+8552 (HD 201748) : 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 20507+8552 (HD 201748) : ALADIN DSS IMAGE @ 20^h 50^m 42.69^s +85° 52' 04.6"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 20507+8552 STF 2794 (HD 201748) : 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		20507+8552	STF2794		90	17.7
Show		20376+8551	LOC 458		163	3.6	15
Show		20487+8506	LOC 471	AB	331	1.5	47
Show		21105+8356	LOC 481		15	21.0	119
Show		20319+8350	LOC 456		266	1.1	125
Show		20345+8254	MLR 235		165	0.8	180
Show		20421+8251	LOC 469		123	1.6	182
Show		20406+8227	TDT2464		181	1.3	206
Show		20573+8219	LOC 470		263	3.1	214
Show		20546+8210	LOC 468		320	5.5	223
Show		20449+8206	LOC 467		231	22.7	227
Show		20520+8158	TDT2588		293	0.7	234
Show		21060+8134	LOC 480		285	3.1	260
Show		21060+8121	PKO 31		119	9.6	273
Show		20465+8118	KPP4213		148	5.2	275
Show		20472+8117	TDT2537		209	1.0	276
Show		20454+8105	LDS1938		321	18.2	288

WDS 20507+8552 : COMPONENTS

	A
B	pa=91.4° sep=1.28"

20507+8552 A

Componente originario normalizzato	AB	Name	HD 201748	Coord arcsec 2000	205042.69+855204.6	Mag	8.54
Spectral class	F0 (yellow-white)	PmRA	13.00	PmDE	16.0	SAO	3488
HIP	102893	Tycho2	4653-00560-1	HD	201748	GC	29348
BD	BD+85 359

Tycho2

Tycho2	4653-00560-1	Pflag		RAmdeg	312.67788437	DEmdeg	85.86795600
PmRA	12.7	PmDE	15.9	E RAmdeg	6	E DEmdeg	6
E pmRA	0.9	E pmDE	1.0	EpRAm	1990.88	EpDEm	1991.10
Num	15	Q RAmdeg	1.5	Q DEmdeg	0.8	Q pmRA	1.6
Q pmDE	0.8	BTmag	8.800	E BTmag	0.017	VTmag	8.541
E VTmag	0.012	Prox	179	TYC	T	HIP	102893
CCDM	A	RAdeg	312.67747750	DEdeg	85.86791944	EpRA 1990	1.67
EpDE 1990	1.71	E RAdeg	5.8	E DEdeg	6.2	Posflg
Corr	0.0

SAO

SAO	3488	DelFlag		RA1950		PmRA1950	0.0167
DE1950		PmDE1950	0.014	Vmag	8.2	SpType	F0
Double code		Source	70	CatNum	29348	DM	BD+85 359
DMcomp		BDsup		HD	201748	M HD	0
GC	29348	RA1950rad	5.49355084	DE1950rad	1.49531621	PmRA2000	0.0172
PmDE2000	0.011

Hipparcos

Catalog	H	HIP	102893	Proxy		RAhms	20 50 42.58
DEdms	+85 52 04.5	Vmag	8.52	VarFlag		R Vmag	G
RAdeg	312.677	DEdeg	85.8679	AstroRef	A	Plx	5.62
CCDM	20508+8552	N CCDM	I	Nsys	2	Ncomp	1
MultFlag	C	Source	P	Qual	A	M HIP
Theta		Rho		HD	201748	BD	BD+85 359
CD		CP		Dm number	+85 359	VIred	0.24
SpType	F0	R SpType		Coord arcsec 2000	205042.58+855204.5

Hipparcos 2

HIP	102893	Sn	95	So	3	Nc	1
RArad	5.4572505999	DErad	1.4986778494	Plx	4.15	PmRA	12.63
PmDE	14.71	E RArad	0.81	E DErad	0.72	E Plx	0.85
E pmRA	1.07	E pmDE	0.9	Hpmag	8.5948	E Hpmag	0.0095
SHp	0.034	VA	0	BV	0.218	E BV	0.015
VI	0.24

20507+8552 B

Componente originario normalizzato	AB		Coord arcsec 2000	205043.87+855204.6		Mag	10.88		PmRA	9.00
PmDE	5.0		Calc delta mag	2.34		Calc coord	yes