20125+5128 AC   17AC

Coord 2000	20125+5128		Discov num	AC   17		Comp	AC		Coord arcsec 2000	20 12 31.73 +51 27 49.0
Date first	1913		Date last	2015		Obs	5
Pa first	8		Pa last	9		P.A. Now (θ)	9°
Sep first	83.2		Sep last	84.8		Sep. Now (ρ)	84.8"
Mag pri	6.17		Mag sec	12.63		delta mag (ΔM)	6.46		Spectral class	K2.5III (yellow-orange)
Pri motion ra	-015		Sec motion ra	+001
Pri motion dec	-015		Sec motion dec	-004
Notes

rPM=0.915 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		32354	20 12 32 +51 27 49	AC 17 AB	2016	16	82	4.4	6.17	10.55	4.38
Show		32354	20 12 32 +51 27 49	AC 17 AC	2015	5	9	84.8	6.17	12.63	6.46		<===
Show		32354	20 12 32 +51 27 49	AC 17 AD	2015	5	80	75.1	6.17	12.80	6.63
Show		32354	20 12 32 +51 27 49	AC 17 AE	2015	8	148	130.4	6.17	10.78	4.61

Quintuple system
5 visible stars in this system

Precise pa	8.5		Precise sep	84.762		Constellation	Cygnus		SAO	32354
HIP	99579		Tycho2	3571-02335-1		Gaia DR2	2088224614133708544		HD	192439
HR	7726		BD	BD+51 2796		Distance	106.16		Distance ly	346.29

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20125+5128	AC 17	AC	2000	3	9	84.7	6.17	12.80	K2.5III	D	201231.73+512749.0
20125+5128	AC 17	AC	2003	4	8	84.9	6.17	12.80	K2.5III	D	201231.73+512749.0
20125+5128	AC 17	AC	2015	5	9	84.8	6.17	12.63	K2.5III		201231.73+512749.0

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