20277+4507 BKO 154AH

Coord 2000	20277+4507		Discov num	BKO 154		Comp	AH		Coord arcsec 2000	20 27 42.34 +45 06 37.7
Date first	1998		Date last	2015		Obs	7
Pa first	224		Pa last	224		P.A. Now (θ)	224°
Sep first	18.5		Sep last	18.4		Sep. Now (ρ)	18.4"
Mag pri	9.38		Mag sec	12.70		delta mag (ΔM)	3.32		Spectral class	A2 (white)
Pri motion ra	-009		Sec motion ra	-032
Pri motion dec	-007		Sec motion dec	-018
Notes

rPM=0.694 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 27 42 +45 06 38	ROE 43 AB	2015	9	317	17.4	9.38	14.80	5.42
Show			20 27 42 +45 06 38	ROE 43 AC	2015	8	312	52.6	9.38	13.19	3.81
Show			20 27 42 +45 06 38	ROE 43 AD	2015	9	271	42.4	9.38	12.47	3.09
Show			20 27 42 +45 06 38	ROE 43 AE	2015	11	282	82.9	9.38	11.19	1.81
Show			20 27 42 +45 06 38	ROE 43 AF	2015	13	336	87.1	9.38	12.40	3.02
Show			20 27 42 +45 06 38	ROE 43 AG	2015	13	282	102.4	9.38	12.85	3.47
Show			20 27 42 +45 06 38	BKO 154 AH	2015	7	224	18.4	9.38	12.70	3.32		<===
Show			20 27 42 +45 06 38	BKO 154 AI	2015	7	63	24.2	9.38	14.00	4.62
Show			20 27 39 +45 07 13	BKO 154 CJ	2015	4	331	17.9	13.40	13.90	0.50
Show			20 27 35 +45 06 55	BKO 154 EK	2015	4	109	4.7	11.20	13.00	1.80

11-fold system
11 visible stars in this system

Precise pa	223.7		Precise sep	18.427		Constellation	Cygnus		Tycho2	3573-00540-1
Gaia DR2	2070872460915410304

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20277+4507	BKO 154	AH	2003	2	224	18.6	9.38	12.70		D	202742.34+450637.7
20277+4507	BKO 154	AH	2015	4	224	18.5	9.38	12.70	A2		202742.34+450637.7

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