20113+3550 BU  430AC

Coord 2000	20113+3550		Discov num	BU  430		Comp	AC		Coord arcsec 2000	20 11 19.16 +35 49 49.0
Date first	1926		Date last	2015		Obs	5
Pa first	174		Pa last	173		P.A. Now (θ)	173°
Sep first	7.6		Sep last	7.2		Sep. Now (ρ)	7.2"
Mag pri	9.69		Mag sec	14.20		delta mag (ΔM)	4.51		Spectral class	B2III-IV (blue-white)
Pri motion ra	-005		Sec motion ra	+018
Pri motion dec	-008		Sec motion dec	-007
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.192 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20113+3550	BU 430	AB	1877	2016	19	23	1.2	9.69	10.37	0.68
Show			20113+3550	BU 430	AC	1926	2015	5	173	7.2	9.69	14.20	4.51		<===
Show			20113+3550	HJ 1489	AD	1828	2018	21	52	17.1	9.69	9.88	0.19

Quadruple system
4 visible stars in this system

Precise pa	173.3		Precise sep	7.151		Constellation	Cygnus		Tycho2	2683-03018-1
Gaia DR2	27281717888

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20113+3550	BU 430	AC	2002	3	175	7.6	9.69	14.20	B2III-IV	D	201119.16+354949.0
20113+3550	BU 430	AC	2015	5	173	7.2	9.69	14.20	B2III-IV	N	201119.16+354949.0

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