20163+3924 SEI1051

Coord 2000	20163+3924		Discov num	SEI1051		Comp			Coord arcsec 2000	20 16 18.85 +39 23 30.2
Date first	1892		Date last	2015		Obs	11
Pa first	149		Pa last	148		P.A. Now (θ)	148°
Sep first	22.2		Sep last	22.3		Sep. Now (ρ)	22.3"
Mag pri	10.05		Mag sec	11.47		delta mag (ΔM)	1.42		Spectral class	A2 (white)
Pri motion ra	+003		Sec motion ra	+002
Pri motion dec	+001		Sec motion dec	+002
Notes

rPM=0.447 Nature of this double is uncertain.

Precise pa	147.7		Precise sep	22.328		Constellation	Cygnus		Tycho2	3155-00956-1
Gaia DR2	89282621440		HD	228681

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20163+3924	SEI1051		1998	4	148	22.4	10.05	11.60	A2	D	201618.85+392330.2
20163+3924	SEI1051		2002	5	148	22.3	10.05	11.60	A2	D	201618.85+392330.2
20163+3924	SEI1051		2010	6	148	22.3	10.05	11.47	A2		201618.85+392330.2
20163+3924	SEI1051		2015	7	148	22.3	10.05	11.47	A2		201618.85+392330.2

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