20108+3654 SEI 956

Coord 2000	20108+3654		Discov num	SEI 956		Comp			Coord arcsec 2000	20 10 47.42 +36 53 49.8
Date first	1896		Date last	2015		Obs	10
Pa first	255		Pa last	257		P.A. Now (θ)	257°
Sep first	12.1		Sep last	12.0		Sep. Now (ρ)	12"
Mag pri	12.37		Mag sec	12.90		delta mag (ΔM)	0.53		Spectral class
Pri motion ra	-005		Sec motion ra	-004
Pri motion dec	-010		Sec motion dec	-005
Notes

rPM=0.456 Nature of this double is uncertain.

Precise pa	257.2		Precise sep	12.04		Constellation	Cygnus		Tycho2	2683-02171-1
Gaia DR2	22513304192

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20108+3654	SEI 956		1983	2	75	12.2	10.50	11.00			201007.50+365400.0
20108+3654	SEI 956		1998	3	257	12.2	12.37	12.90		D	201047.42+365349.8
20108+3654	SEI 956		2002	4	257	12.1	12.37	12.90		D	201047.42+365349.8
20108+3654	SEI 956		2010	5	255	12.3	12.37	12.90			201047.42+365349.8
20108+3654	SEI 956		2015	6	257	12.1	12.37	12.90			201047.42+365349.8

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