20007+3635 WEB   9AC

Coord 2000	20007+3635		Discov num	WEB   9		Comp	AC		Coord arcsec 2000	20 00 44.81 +36 35 23.0
Date first	1896		Date last	2004		Obs	12
Pa first	221		Pa last	220		P.A. Now (θ)	220°
Sep first	81.2		Sep last	82.1		Sep. Now (ρ)	82.1"
Mag pri	6.69		Mag sec	9.84		delta mag (ΔM)	3.15		Spectral class	B6IV (blue-white)
Pri motion ra	+004		Sec motion ra	+002
Pri motion dec	-001		Sec motion dec	-001
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.485 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		69252	20007+3635	HDS2851	Aa,Ab	1991	1991	1	332	0.2	6.76	9.75	2.99
Show		69252	20007+3635	WEB 9	AB	1896	2016	22	202	71.6	6.69	8.97	2.28
Show		69252	20007+3635	WEB 9	AC	1896	2004	12	220	82.1	6.69	9.84	3.15		<===
Show		69251	20007+3635	WEB 9	BC	1896	2018	21	279	26.3	8.97	9.84	0.87
Show		69251	20007+3635	WEB 9	CD	1900	2018	13	325	13.9	9.84	10.30	0.46

Quintuple system
4 visible stars in this system

Precise pa	220.1		Precise sep	82.08		Constellation	Cygnus		SAO	69252
HIP	98510		Tycho2	2682-02072-1		Gaia DR2	75407807744		HD	189864
BD	BD+36 3816		Distance	254.45		Distance ly	830.02

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20007+3635	WEB 9	AC	2004	11	220	82.1	6.69	9.84	B6IV	D	200044.81+363523.0

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