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20095+4752
BLL 45
SV Cyg

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20095+4752 BLL 45 (SV Cyg)

20^h 09^m 30.09^s +47° 52' 17.2" P.A. 140.00 sep 145.4 mag 9.01,9.92 Sp N dist. 980.39 pc (3198.03 l.y.)

Coord 2000	20095+4752		Discov num	BLL 45		Comp			Coord arcsec 2000	20 09 30.09 +47 52 17.2
Date first	1879		Date last	2019		Obs	15
Pa first	140		Pa last	140		P.A. Now (θ)	140°
Sep first	145.2		Sep last	145.4		Sep. Now (ρ)	145.4"
Mag pri	9.01		Mag sec	9.92		delta mag (ΔM)	0.91		Spectral class	N (deep red)
Pri motion ra	-001		Sec motion ra	-011
Pri motion dec	-004		Sec motion dec	-008
Notes	N (See Notes)

rPM=0.792

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	139.5		Precise sep	145.37		Var name	SV Cyg		Constellation	Cygnus
HIP	99310		Tycho2	3563-00462-1		Gaia DR2	2082896582641906816		HD	191738
BD	BD+47 3031		Distance	980.39		Distance ly	3198.03

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20095+4752	BLL 45		2004	7	139	145.2	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2010	10	139	145.0	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2015	11	139	144.9	9.01	9.92	N	N	200930.09+475217.2
20095+4752	BLL 45		2019	15	140	145.4	9.01	9.92	N	N	200930.09+475217.2

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