20101+3617 SEI 939AB

Coord 2000	20101+3617		Discov num	SEI 939		Comp	AB		Coord arcsec 2000	20 10 09.67 +36 17 09.2
Date first	1896		Date last	2015		Obs	10
Pa first	213		Pa last	217		P.A. Now (θ)	217°
Sep first	25.2		Sep last	26.3		Sep. Now (ρ)	26.3"
Mag pri	11.40		Mag sec	12.60		delta mag (ΔM)	1.2		Spectral class
Pri motion ra	+017		Sec motion ra	-004
Pri motion dec	-004		Sec motion dec	-003
Notes

rPM=1.204 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69538	20 10 10 +36 17 09	SEI 939 AB	2015	10	217	26.3	11.40	12.60	1.20		<===
Show		69538	20 10 10 +36 17 09	WSI 152 AC	2015	8	31	17.8	11.40	14.10	2.70

Triple system
3 visible stars in this system

Precise pa	216.9		Precise sep	26.302		Constellation	Cygnus		SAO	69538
Tycho2	2683-01174-1		Gaia DR2	2059183209206507520

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20101+3617	SEI 939	AB	2002	3	217	26.1	11.40	12.60			201009.67+361709.2
20101+3617	SEI 939	AB	2013	4	217	26.5	11.40	12.60			201009.67+361709.2
20101+3617	SEI 939	AB	2014	5	217	26.9	11.40	12.60			201009.67+361709.2
20101+3617	SEI 939	AB	2015	6	217	26.3	11.40	12.60			201009.67+361709.2

If you need more information about this double, apply for a data request form to the WDS.