20027+3349 SEI 815AB

Coord 2000	20027+3349		Discov num	SEI 815		Comp	AB		Coord arcsec 2000	20 02 44.05 +33 48 26.9
Date first	1894		Date last	2015		Obs	10
Pa first	1		Pa last	358		P.A. Now (θ)	358°
Sep first	20.1		Sep last	19.4		Sep. Now (ρ)	19.4"
Mag pri	10.91		Mag sec	12.60		delta mag (ΔM)	1.69		Spectral class
Pri motion ra	+005		Sec motion ra	-003
Pri motion dec	-005		Sec motion dec	-006
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.14 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20027+3349	SEI 815	AB	1894	2015	10	358	19.4	10.91	12.60	1.69		<===
Show			20027+3349	SEI 816	AC	1894	2015	10	113	20.6	10.50	11.00	0.50
Show			20027+3349	BKO 523	AD	1998	2015	7	341	5.0	10.50	13.00	2.50

Quadruple system
4 visible stars in this system

Precise pa	358.2		Precise sep	19.391		Constellation	Cygnus		Tycho2	2678-01576-1
Gaia DR2	11751580544

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20027+3349	SEI 815	AB	1998	3	359	19.3	10.50	11.00		D	200244.03+334826.5
20027+3349	SEI 815	AB	2008	4	359	19.6	10.50	11.00		D	200244.03+334826.5
20027+3349	SEI 815	AB	2015	6	358	19.4	10.91	12.60		N	200244.05+334826.9

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