19591+3942 ES 1970AB

Coord 2000	19591+3942		Discov num	ES 1970		Comp	AB		Coord arcsec 2000	19 59 06.99 +39 42 23.4
Date first	1892		Date last	2015		Obs	13
Pa first	149		Pa last	150		P.A. Now (θ)	150°
Sep first	19.2		Sep last	19.1		Sep. Now (ρ)	19.1"
Mag pri	10.00		Mag sec	11.60		delta mag (ΔM)	1.6		Spectral class	G5 (yellow)
Pri motion ra	+002		Sec motion ra	+015
Pri motion dec	-003		Sec motion dec	-041
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.92 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19591+3942	ES 1970	AB	1892	2015	13	150	19.1	10.00	11.60	1.60		<===
Show			19591+3942	BER 1	AE	1924	2015	7	139	46.8	10.00	10.60	0.60
Show			19591+3942	ES 1970	BC	1922	2015	7	335	5.3	11.50	13.20	1.70

Quadruple system
4 visible stars in this system

Precise pa	149.9		Precise sep	19.099		Constellation	Cygnus		Tycho2	3141-02625-1
Gaia DR2	93254703232		HD	226955

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19591+3942	ES 1970	AB	2007	8	150	17.8	10.01	11.40		D	195906.99+394223.4
19591+3942	ES 1970	AB	2015	10	150	19.1	10.00	11.60	G5	N	195906.99+394223.4

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