20121+3710 SEI 995

Coord 2000	20121+3710		Discov num	SEI 995		Comp			Coord arcsec 2000	20 12 07.29 +37 09 33.1
Date first	1896		Date last	2015		Obs	10
Pa first	44		Pa last	44		P.A. Now (θ)	44°
Sep first	23.5		Sep last	23.2		Sep. Now (ρ)	23.2"
Mag pri	9.50		Mag sec	11.00		delta mag (ΔM)	1.5		Spectral class
Pri motion ra	-003		Sec motion ra	-008
Pri motion dec	-007		Sec motion dec	-006
Notes

rPM=0.51 Nature of this double is uncertain.

Precise pa	44		Precise sep	23.16		Constellation	Cygnus		Tycho2	2683-00677-1
Gaia DR2	59880313344

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20121+3710	SEI 995		1983	2	45	23.0	9.50	11.00			201207.29+370933.1
20121+3710	SEI 995		2002	3	44	23.2	9.50	11.00			201207.29+370933.1
20121+3710	SEI 995		2010	5	48	23.6	9.50	11.00			201207.29+370933.1
20121+3710	SEI 995		2015	6	44	23.2	9.50	11.00			201207.29+370933.1

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