20039+4411 ES   85AC

Coord 2000	20039+4411		Discov num	ES   85		Comp	AC		Coord arcsec 2000	20 03 52.48 +44 11 31.9
Date first	1892		Date last	2017		Obs	13
Pa first	90		Pa last	84		P.A. Now (θ)	84°
Sep first	11.3		Sep last	10.7		Sep. Now (ρ)	10.7"
Mag pri	10.52		Mag sec	12.50		delta mag (ΔM)	1.98		Spectral class	A0 (white)
Pri motion ra	+000		Sec motion ra	-004
Pri motion dec	-010		Sec motion dec	-002
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.894 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20039+4411	ES 85	AB	1828	2017	14	33	2.3	10.52	11.20	0.68
Show			20039+4411	ES 85	AC	1892	2017	13	84	10.7	10.52	12.50	1.98		<===
Show			20039+4411	ES 85	AD	1892	2017	9	308	11.3	10.52	13.10	2.58

Quadruple system
4 visible stars in this system

Precise pa	84.3		Precise sep	10.667		Constellation	Cygnus		Tycho2	3162-00108-1
Gaia DR2	61712491776		HD	190586

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20039+4411	ES 85	AC	1998	8	86	10.5	10.52	12.00	A0	D	200352.48+441131.9
20039+4411	ES 85	AC	2003	10	85	10.6	10.52	12.00	A0	N D	200352.48+441131.9
20039+4411	ES 85	AC	2015	11	84	10.7	10.52	12.00	A0	N	200352.48+441131.9
20039+4411	ES 85	AC	2017	13	84	10.7	10.52	12.50	A0	N	200352.48+441131.9

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