20201+3921 ES 2050AC

Coord 2000	20201+3921		Discov num	ES 2050		Comp	AC		Coord arcsec 2000	20 20 06.87 +39 21 17.6
Date first	1933		Date last	2015		Obs	10
Pa first	190		Pa last	191		P.A. Now (θ)	191°
Sep first	11.0		Sep last	11.2		Sep. Now (ρ)	11.2"
Mag pri	9.50		Mag sec	13.80		delta mag (ΔM)	4.3		Spectral class
Pri motion ra	-003		Sec motion ra	-005
Pri motion dec	-006		Sec motion dec	-007
Notes

rPM=0.26 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69856	20 20 07 +39 21 18	ES 2050 AB	2015	7	92	5.9	9.50	12.50	3.00
Show		69856	20 20 07 +39 21 18	ES 2050 AC	2015	10	191	11.2	9.50	13.80	4.30		<===

Triple system
3 visible stars in this system

Precise pa	190.9		Precise sep	11.218		Constellation	Cygnus		SAO	69856
Tycho2	3152-01557-1		Gaia DR2	2061461912692370688		HD	193702		HR	7784
DM	BD+38 4021

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20201+3921	ES 2050	AC	1998	3	190	11.2	9.62			D	202006.87+392117.6
20201+3921	ES 2050	AC	2008	4	191	11.2	9.62			D	202006.87+392117.6
20201+3921	ES 2050	AC	2015	6	191	11.2	9.50	13.80			202006.87+392117.6

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