20153+2536 BU  983AB (QR Vul)

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	2016		Obs	31
Pa first	154		Pa last	190		P.A. Now (θ)	190°
Sep first	0.8		Sep last	0.4		Sep. Now (ρ)	0.4"
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)

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	QR Vul	88410	20153+2536	BU 983	AB	1879	2016	31	190	0.4	4.80	7.55	2.75		<===
Show		88410	20153+2536	BU 983	AC	1912	2015	6	83	115.7	4.80	9.70	4.90

Triple system
3 visible stars in this system

Precise pa	190.1		Precise sep	0.433		Var name	QR Vul		Constellation	Vulpecula
SAO	88410		HIP	99824		Tycho2	2159-02068-1		Gaia DR2	77682835200
HD	192685		HR	7739		BD	BD+25 4165		Distance	303.95
Distance ly	991.48

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
20153+2536	BU 983	AB	2016	31	190	0.4	4.80	7.55	B3V	N	201515.89+253531.1

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