20108+3652 SEI 957

Coord 2000	20108+3652		Discov num	SEI 957		Comp			Coord arcsec 2000	20 10 47.59 +36 51 16.8
Date first	1896		Date last	2015		Obs	9
Pa first	77		Pa last	76		P.A. Now (θ)	76°
Sep first	27.8		Sep last	28.3		Sep. Now (ρ)	28.3"
Mag pri	11.10		Mag sec	12.64		delta mag (ΔM)	1.54		Spectral class
Pri motion ra	-001		Sec motion ra	+003
Pri motion dec	-006		Sec motion dec	-002
Notes

rPM=0.93 This double is not physical.

Precise pa	75.5		Precise sep	28.285		Constellation	Cygnus		Tycho2	2683-02401-1
Gaia DR2	89886247680

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20108+3652	SEI 957		1998	2	76	28.2	11.10	12.60		D	201047.59+365116.8
20108+3652	SEI 957		2002	3	76	28.2	11.10	12.60		D	201047.59+365116.8
20108+3652	SEI 957		2010	4	76	27.7	11.10	12.64			201047.59+365116.8
20108+3652	SEI 957		2015	5	75	28.3	11.10	12.64			201047.59+365116.8

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