20330+3144 ES  365AC

Coord 2000	20330+3144		Discov num	ES  365		Comp	AC		Coord arcsec 2000	20 33 02.60 +31 44 08.3
Date first	1901		Date last	2015		Obs	8
Pa first	319		Pa last	319		P.A. Now (θ)	319°
Sep first	33.9		Sep last	33.6		Sep. Now (ρ)	33.6"
Mag pri	8.48		Mag sec	11.67		delta mag (ΔM)	3.19		Spectral class	K2 (yellow-orange)
Pri motion ra	+004		Sec motion ra	+060
Pri motion dec	-003		Sec motion dec	-017
Notes

rPM=0.926 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20330+3144	ES 365	AB	1901	2015	8	263	25.7	8.48	11.80	3.32
Show			20330+3144	ES 365	AC	1901	2015	8	319	33.6	8.48	11.67	3.19		<===
Show			20330+3144	ES 365	CD	1906	2015	4	283	2.7	11.20	12.40	1.20

Quadruple system
4 visible stars in this system

Precise pa	319		Precise sep	33.592		Constellation	Cygnus		SAO	70179
HIP	101404		Tycho2	2686-00827-1		Gaia DR2	04247200384		BD	BD+31 4125
Distance	436.68		Distance ly	1424.45

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20330+3144	ES 365	AC	1999	1	319	33.6	8.48	11.20	K2	D	203302.60+314408.3
20330+3144	ES 365	AC	2002	6	319	33.6	8.48	11.20	K2	D	203302.60+314408.3
20330+3144	ES 365	AC	2013	7	319	33.8	8.48	11.67	K2		203302.60+314408.3
20330+3144	ES 365	AC	2015	8	319	33.6	8.48	11.67	K2		203302.60+314408.3

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