20136+3553 SEI1021AB

Coord 2000	20136+3553		Discov num	SEI1021		Comp	AB		Coord arcsec 2000	20 13 34.11 +35 52 53.8
Date first	1896		Date last	2015		Obs	8
Pa first	241		Pa last	248		P.A. Now (θ)	248°
Sep first	14.7		Sep last	13.4		Sep. Now (ρ)	13.4"
Mag pri	10.90		Mag sec	12.40		delta mag (ΔM)	1.5		Spectral class
Pri motion ra	-007		Sec motion ra	+004
Pri motion dec	-009		Sec motion dec	+007
Notes

rPM=1.703 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 13 34 +35 52 54	SEI 1021 AB	2015	8	248	13.4	10.90	12.40	1.50		<===
Show			20 13 34 +35 52 54	SEI 1021 AC	2015	2	253	10.3	10.90	14.20	3.30
Show			20 13 34 +35 52 54	SEI 1021 AD	2015	7	121	6.9	10.90	15.10	4.20
Show			20 13 33 +35 52 48	SEI 1021 BC	2016	3	52	3.3	12.40	14.20	1.80

Quadruple system
4 visible stars in this system

Precise pa	247.5		Precise sep	13.408		Constellation	Cygnus		Tycho2	2683-03118-1
Gaia DR2	2058916891197902336

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20136+3553	SEI1021	AB	2011	7	247	13.4	10.90	12.40		D	201334.11+355253.8
20136+3553	SEI1021	AB	2015	8	248	13.4	10.90	12.40			201334.11+355253.8

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