20183+2539 BU  985AB

Coord 2000	20183+2539		Discov num	BU  985		Comp	AB		Coord arcsec 2000	20 18 17.06 +25 38 53.7
Date first	1880		Date last	2009		Obs	8
Pa first	149		Pa last	153		P.A. Now (θ)	153°
Sep first	5.0		Sep last	5.9		Sep. Now (ρ)	5.9"
Mag pri	6.99		Mag sec	12.80		delta mag (ΔM)	5.81		Spectral class	B2V (blue-white)
Pri motion ra	+002		Sec motion ra
Pri motion dec	+004		Sec motion dec
Notes	N (See Notes)

Visually invisible, K-band or other infrared star 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		88490	20183+2539	BU 985	AB	1880	2009	8	153	5.9	6.99	12.80	5.81		<===
Show		88490	20183+2539	HJ 1499	AC	1828	2015	22	355	21.5	6.96	10.87	3.91
Show		88490	20183+2539	WAL 131	AE	1898	2015	22	151	122.8	6.96	8.13	1.17
Show		88490	20183+2539	BU 985	CD	1893	2015	13	67	8.6	10.87	13.60	2.73

Quintuple system
5 visible stars in this system

Precise pa	153.1		Precise sep	5.94		Constellation	Vulpecula		SAO	88490
HIP	100088		Tycho2	2159-00108-1		Gaia DR2	05164694144		HD	193220
BD	BD+25 4189		Distance	729.93		Distance ly	2381.03

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20183+2539	BU 985	AB	2006	7	158	5.3	6.99	12.80	B2V	N D	201817.06+253853.7
20183+2539	BU 985	AB	2009	8	153	5.9	6.99	12.80	B2V	N D	201817.06+253853.7

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