20203+3920 SEI1090

Coord 2000	20203+3920		Discov num	SEI1090		Comp			Coord arcsec 2000	20 20 17.45 +39 20 21.7
Date first	1892		Date last	2015		Obs	15
Pa first	172		Pa last	155		P.A. Now (θ)	155°
Sep first	14.7		Sep last	13.4		Sep. Now (ρ)	13.4"
Mag pri	9.43		Mag sec	10.60		delta mag (ΔM)	1.17		Spectral class
Pri motion ra	-002		Sec motion ra	+025
Pri motion dec	-005		Sec motion dec	+012
Notes

rPM=1.151 This double is not physical.

Precise pa	154.6		Precise sep	13.391		Constellation	Cygnus		SAO	69856
Tycho2	3152-01516-1		Gaia DR2	47236018816		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
20203+3920	SEI1090		1998	8	157	13.4	9.43	10.60		D	202017.45+392021.7
20203+3920	SEI1090		2008	9	156	13.4	9.43	10.60		D	202017.45+392021.7
20203+3920	SEI1090		2015	11	155	13.4	9.43	10.60			202017.45+392021.7

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