20028+2331 POU4188AB

Coord 2000	20028+2331		Discov num	POU4188		Comp	AB		Coord arcsec 2000	20 02 44.78 +23 31 21.0
Date first	1898		Date last	2015		Obs	8
Pa first	328		Pa last	314		P.A. Now (θ)	314°
Sep first	15.6		Sep last	16.6		Sep. Now (ρ)	16.6"
Mag pri	10.54		Mag sec	14.00		delta mag (ΔM)	3.46		Spectral class
Pri motion ra	+057		Sec motion ra
Pri motion dec	+050		Sec motion dec
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			20028+2331	POU4188	AB	1898	2015	8	314	16.6	10.54	14.00	3.46		<===
Show			20028+2331	BKO 756	AC	2000	2015	8	296	16.9	10.50	13.50	3.00
Show			20028+2331	BKO 756	BC	2000	2015	7	218	5.2	14.00	13.50	0.50

Triple system
3 visible stars in this system

Precise pa	313.5		Precise sep	16.598		Constellation	Vulpecula		Tycho2	2141-00911-1
Gaia DR2	54739971840		HD	345559

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20028+2331	POU4188	AB	2009	3	314	16.2	10.54	14.00		D	200244.78+233121.0
20028+2331	POU4188	AB	2015	5	314	16.6	10.54	14.00			200244.78+233121.0

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