20169+4022 BU  661AC

Coord 2000	20169+4022		Discov num	BU  661		Comp	AC		Coord arcsec 2000	20 16 55.28 +40 21 54.3
Date first	1912		Date last	2014		Obs	5
Pa first	218		Pa last	217		P.A. Now (θ)	217°
Sep first	111.7		Sep last	111.7		Sep. Now (ρ)	111.7"
Mag pri	5.44		Mag sec	13.68		delta mag (ΔM)	8.24		Spectral class	K3.5IIab (yellow-orange)
Pri motion ra	+002		Sec motion ra	+001
Pri motion dec	-001		Sec motion dec	-002
Notes

rPM=0.632 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		49410	20 16 55 +40 21 54	BU 661 AB	2014	16	69	12.3	5.24	11.50	6.26
Show		49410	20 16 55 +40 21 54	BU 661 AC	2014	5	217	111.7	5.44	13.68	8.24		<===

Triple system
3 visible stars in this system

Precise pa	217.2		Precise sep	111.742		Constellation	Cygnus		SAO	49410
HIP	99968		Tycho2	3155-02323-1		Gaia DR2	2062313797982404608		HD	193092
HR	7759		BD	BD+39 4114		Distance	483.09		Distance ly	1575.84

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20169+4022	BU 661	AC	1998	2	217	111.9	5.24	12.30	K3.5IIab	D	201655.28+402154.3
20169+4022	BU 661	AC	2002	3	218	111.1	5.24	12.30	K3.5IIab	D	201655.28+402154.3
20169+4022	BU 661	AC	2013	4	217	111.5	5.44	13.68	K3.5IIab		201655.28+402154.3
20169+4022	BU 661	AC	2014	5	217	111.7	5.44	13.68	K3.5IIab		201655.28+402154.3

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