20137+4323 BU  660AB

Coord 2000	20137+4323		Discov num	BU  660		Comp	AB		Coord arcsec 2000	20 13 42.81 +43 22 44.4
Date first	1878		Date last	2015		Obs	13
Pa first	318		Pa last	318		P.A. Now (θ)	318°
Sep first	9.4		Sep last	8.7		Sep. Now (ρ)	8.7"
Mag pri	6.29		Mag sec	12.70		delta mag (ΔM)	6.41		Spectral class	K3III (yellow-orange)
Pri motion ra	-002		Sec motion ra
Pri motion dec	+003		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		49336	20 13 43 +43 22 44	BU 660 AB	2015	13	318	8.7	6.29	12.70	6.41		<===
Show		49336	20 13 43 +43 22 44	BU 660 AC	2015	11	190	58.2	6.29	12.92	6.63
Show		49336	20 13 43 +43 22 44	FOX 250 AD	2015	5	279	31.5	6.29	14.70	8.41

Quadruple system
4 visible stars in this system

Precise pa	318.1		Precise sep	8.717		Constellation	Cygnus		SAO	49336
HIP	99685		Tycho2	3163-01634-1		Gaia DR2	2080897296848794368		HD	192535
HR	7733		BD	BD+42 3642		Distance	208.77		Distance ly	681.01

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20137+4323	BU 660	AB	1958	11	319	9.1	6.20	12.70	K3III	D	201342.82+432244.4
20137+4323	BU 660	AB	2014	12	318	8.4	6.29	12.70	K3III		201342.81+432244.4
20137+4323	BU 660	AB	2015	13	318	8.7	6.29	12.70	K3III		201342.81+432244.4

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