20069+3115 SEI 882AB

Coord 2000	20069+3115		Discov num	SEI 882		Comp	AB		Coord arcsec 2000	20 06 52.25 +31 15 02.2
Date first	1893		Date last	2015		Obs	21
Pa first	62		Pa last	60		P.A. Now (θ)	60°
Sep first	28.6		Sep last	33.9		Sep. Now (ρ)	33.9"
Mag pri	8.86		Mag sec	10.58		delta mag (ΔM)	1.72		Spectral class	F7V (yellow-white)
Pri motion ra	-039		Sec motion ra	+007
Pri motion dec	-030		Sec motion dec	+001
Notes	L (Linear solution)

Visually invisible, K-band or other infrared star rPM=1.127 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69428	20069+3115	SEI 882	AB	1893	2015	21	60	33.9	8.86	10.58	1.72		<===
Show		69428	20069+3115	ES 2690	AC	1893	2015	16	250	33.6	8.86	10.55	1.69
Show		69428	20069+3115	ABH 130	AD	1987	2015	8	208	61.2	8.86	13.42	4.56
Show		69428	20069+3115	ABH 130	AE	1987	2015	8	222	65.0	8.86	13.36	4.50

Quintuple system
5 visible stars in this system

Precise pa	60.2		Precise sep	33.899		Constellation	Cygnus		SAO	69428
Tycho2	2671-01412-1		Gaia DR2	69597882624

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20069+3115	SEI 882	AB	2007	12	60	33.5	8.86	10.58	F7V	LD	200652.25+311502.2
20069+3115	SEI 882	AB	2010	13	60	33.6	8.86	10.58	F7V	LD	200652.25+311502.2
20069+3115	SEI 882	AB	2012	15	60	33.6	8.86	10.58	F7V	LD	200652.25+311502.2
20069+3115	SEI 882	AB	2015	16	60	33.9	8.86	10.58	F7V	L	200652.25+311502.2

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