20153+2536 BU  983AB

Coord 2000	20153+2536		Discov num	BU  983		Comp	AB		Coord arcsec 2000	20 15 15.89 +25 35 31.1
Date first	1879		Date last	2011		Obs	30
Pa first	154		Pa last	185		P.A. Now (θ)	185°
Sep first	0.8		Sep last	0.5		Sep. Now (ρ)	0.5"
Mag pri	4.80		Mag sec	7.55		delta mag (ΔM)	2.75		Spectral class	B3V (blue-white)
Pri motion ra	+002		Sec motion ra
Pri motion dec	-007		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		88410	20153+2536	BU 983	AB	1879	2011	30	185	0.5	4.80	7.55	2.75		<===
Show			20153+2536	BU 983	AC	1912	2013	5	83	115.0	4.80	9.70	4.90

Triple system
3 visible stars in this system

Precise pa	185.4		Precise sep	0.47		Constellation	Vulpecula		SAO	88410
HD	192685		HR	7739		last precise pa	185.4		last precise sep	0.47

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20153+2536	BU 983	AB	2004	26	183	0.5	4.80	7.55	B3V	N D	201515.89+253531.1
20153+2536	BU 983	AB	2007	29	184	0.5	4.80	7.55	B3V	N D	201515.89+253531.1
20153+2536	BU 983	AB	2011	30	185	0.5	4.80	7.55	B3V	N	201515.89+253531.1

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