20169+4022 BU  661AB

Coord 2000	20169+4022		Discov num	BU  661		Comp	AB		Coord arcsec 2000	20 16 55.28 +40 21 54.3
Date first	1878		Date last	2014		Obs	16
Pa first	67		Pa last	69		P.A. Now (θ)	69°
Sep first	12.6		Sep last	12.3		Sep. Now (ρ)	12.3"
Mag pri	5.24		Mag sec	11.50		delta mag (ΔM)	6.26		Spectral class	K3.5IIab (yellow-orange)
Pri motion ra	+004		Sec motion ra
Pri motion dec	-004		Sec motion dec
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		49410	20169+4022	BU 661	AB	1878	2014	16	69	12.3	5.24	11.50	6.26		<===
Show		49410	20169+4022	BU 661	AC	1912	2014	5	217	111.7	5.44	13.68	8.24

Triple system
3 visible stars in this system

Precise pa	68.7		Precise sep	12.331		Constellation	Cygnus		SAO	49410
HIP	99968		Tycho2	3155-02323-1		Gaia DR2	97982404608		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	AB	1958	14	66	12.6	5.24	11.50	K3.5IIab	D	201655.28+402154.3
20169+4022	BU 661	AB	2013	15	65	12.6	5.24	11.50	K3.5IIab		201655.28+402154.3
20169+4022	BU 661	AB	2014	16	69	12.3	5.24	11.50	K3.5IIab		201655.28+402154.3

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