20301+4857 BU  669AC

Coord 2000	20301+4857		Discov num	BU  669		Comp	AC		Coord arcsec 2000	20 30 03.53 +48 57 05.6
Date first	1878		Date last	2013		Obs	11
Pa first	86		Pa last	89		P.A. Now (θ)	89°
Sep first	56.3		Sep last	55.8		Sep. Now (ρ)	55.8"
Mag pri	4.92		Mag sec	11.77		delta mag (ΔM)	6.85		Spectral class	B2.5IV (blue-white)
Pri motion ra	+011		Sec motion ra	+009
Pri motion dec	+007		Sec motion dec	-016
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.258 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Ome1 Cyg	49712	20301+4857	BU 669	AB	1878	2013	10	336	15.0	4.95	12.90	7.95
Show		49712	20301+4857	BU 669	AC	1878	2013	11	89	55.8	4.92	11.77	6.85		<===
Show		49712	20301+4857	GUI 32	AD	1899	2015	7	44	131.1	4.92	11.99	7.07

Quadruple system
4 visible stars in this system

Precise pa	88.8		Precise sep	55.78		Constellation	Cygnus		SAO	49712
HIP	101138		Tycho2	3581-02031-1		Gaia DR2	91862120192		HD	195556
HR	7844		GC	28537		BD	BD+48 3142		Bayer	Omega 1 Cygni
Bayer name	Ome1 Cyg		Flamsteed	45 Cygni		Flamsteed name	45 Cyg		Distance	278.55
Distance ly	908.63

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20301+4857	BU 669	AC	2000	9	88	55.9	4.95	9.40	B2.5IV	N D	203003.53+485705.6
20301+4857	BU 669	AC	2003	10	88	55.8	4.95	9.40	B2.5IV	N D	203003.53+485705.6
20301+4857	BU 669	AC	2013	11	89	55.8	4.92	11.77	B2.5IV	N	203003.53+485705.6

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