20317+3831 ES  246AC

Coord 2000	20317+3831		Discov num	ES  246		Comp	AC		Coord arcsec 2000	20 31 41.28 +38 31 15.2
Date first	1895		Date last	2015		Obs	20
Pa first	354		Pa last	354		P.A. Now (θ)	354°
Sep first	10.1		Sep last	9.9		Sep. Now (ρ)	9.9"
Mag pri	10.92		Mag sec	12.40		delta mag (ΔM)	1.48		Spectral class
Pri motion ra	-001		Sec motion ra	-010
Pri motion dec	-007		Sec motion dec	+010
Notes	N (See Notes)

rPM=1.36 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 31 41 +38 31 15	ES 246 AB	2014	4	355	5.1	10.92	13.40	2.48
Show			20 31 41 +38 31 15	ES 246 AC	2015	20	354	9.9	10.92	12.40	1.48		<===

Triple system
3 visible stars in this system

Precise pa	353.8		Precise sep	9.903		Constellation	Cygnus		Tycho2	3153-01233-1
Gaia DR2	2063911938137156352

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20317+3831	ES 246	AC	1998	6	353	10.0	10.92	12.40		D	203141.28+383115.2
20317+3831	ES 246	AC	2009	7	354	10.0	10.92	12.40		D	203141.28+383115.2
20317+3831	ES 246	AC	2013	9	353	10.0	10.92	12.40			203141.28+383115.2
20317+3831	ES 246	AC	2015	17	354	9.9	10.92	12.40		N	203141.28+383115.2

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