20358+5435 ES  991AB

Coord 2000	20358+5435		Discov num	ES  991		Comp	AB		Coord arcsec 2000	20 35 45.34 +54 35 16.7
Date first	1901		Date last	2018		Obs	14
Pa first	298		Pa last	297		P.A. Now (θ)	297°
Sep first	16.1		Sep last	15.9		Sep. Now (ρ)	15.9"
Mag pri	9.33		Mag sec	10.30		delta mag (ΔM)	0.97		Spectral class	K7 (yellow-orange)
Pri motion ra	-002		Sec motion ra	-006
Pri motion dec	-005		Sec motion dec	-006
Notes

rPM=0.486 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		32720	20 35 45 +54 35 17	ES 991 AB	2018	14	297	15.9	9.33	10.30	0.97		<===
Show		32720	20 35 45 +54 35 17	ES 991 AC	2018	11	107	61.7	9.33	10.79	1.46
Show		32720	20 35 52 +54 34 60	ES 991 CD	2016	5	120	2.6	10.79	13.20	2.41

Quadruple system
4 visible stars in this system

Precise pa	297.3		Precise sep	15.902		Constellation	Cygnus		SAO	32720
Tycho2	3954-01980-1		Gaia DR2	2183467163189146112		HD	235289

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20358+5435	ES 991	AB	2006	5	297	16.2	9.33	10.30	K7	D	203545.34+543516.7
20358+5435	ES 991	AB	2017	7	298	16.0	9.33	10.30	K7		203545.34+543516.7
20358+5435	ES 991	AB	2018	9	298	16.2	9.33	10.30	K7		203545.34+543516.7

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