20099+5657 ES  132AB

Coord 2000	20099+5657		Discov num	ES  132		Comp	AB		Coord arcsec 2000	20 09 51.36 +56 57 13.6
Date first	1902		Date last	2018		Obs	43
Pa first	81		Pa last	83		P.A. Now (θ)	83°
Sep first	5.3		Sep last	5.4		Sep. Now (ρ)	5.4"
Mag pri	9.48		Mag sec	9.82		delta mag (ΔM)	0.34		Spectral class	F8+F8 (yellow-white/yellow-white)
Pri motion ra	+030		Sec motion ra	+027
Pri motion dec	+039		Sec motion dec	+037
Notes	V (Proper motion indicates physical)

Visually invisible, K-band or other infrared star rPM=0.073 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		32330	20099+5657	ES 132	AB	1902	2018	43	83	5.4	9.48	9.82	0.34		<===
Show		32330	20099+5657	ES 132	AC	1902	2018	41	63	32.7	9.48	9.68	0.20
Show		32330	20099+5657	ES 132	BC	1902	2018	34	60	27.6	9.82	9.68	0.14

Triple system
3 visible stars in this system

Precise pa	83.1		Precise sep	5.437		Constellation	Cygnus		SAO	32330
Tycho2	3944-01820-1		Gaia DR2	36426316032		HD	239339

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20099+5657	ES 132	AB	2008	29	82	5.4	9.48	9.82	F8 F8	D	200951.36+565713.6
20099+5657	ES 132	AB	2010	30	83	5.5	9.48	9.82	F8 F8	D	200951.36+565713.6
20099+5657	ES 132	AB	2015	38	83	5.5	9.48	9.82	F8+F8		200951.36+565713.6
20099+5657	ES 132	AB	2018	39	83	5.4	9.48	9.82	F8+F8		200951.36+565713.6

If you need more information about this double, apply for a data request form to the WDS.