20021+5439 MLR 580EF

Coord 2000	20021+5439		Discov num	MLR 580		Comp	EF		Coord arcsec 2000	20 02 29.86 +54 37 39.2
Date first	1981		Date last	2008		Obs	3
Pa first	174		Pa last	159		P.A. Now (θ)	159°
Sep first	0.4		Sep last	0.6		Sep. Now (ρ)	0.6"
Mag pri	8.90		Mag sec	13.20		delta mag (ΔM)	4.3		Spectral class	K5 (yellow-orange)
Pri motion ra	+013		Sec motion ra
Pri motion dec	+018		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20021+5439	BU 426	AB	1877	2016	20	307	5.9	8.53	10.50	1.97
Show			20021+5439	BU 426	AC	1877	2015	17	53	163.2	8.53	8.39	0.14
Show			20021+5439	BU 427	CD	1877	2011	15	336	3.1	8.39	10.18	1.79
Show			20021+5439	ENG 68	CE	1884	2015	13	158	160.3	8.39	8.92	0.53
Show			20021+5439	MLR 580	EF	1981	2008	3	159	0.6	8.90	13.20	4.30		<===

Sextuple system
6 visible stars in this system

Precise pa	159		Precise sep	0.563		Constellation	Cygnus		SAO	32230
Tycho2	3940-00818-1		Gaia DR2	02752518400		HD	235089

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20021+5439	MLR 580	EF	2008	3	159	0.6	8.90	13.20	K5	N	200229.86+543739.2

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