20311+3847 SEI1150

Coord 2000	20311+3847		Discov num	SEI1150		Comp			Coord arcsec 2000	20 31 05.27 +38 47 01.8
Date first	1895		Date last	2015		Obs	12
Pa first	75		Pa last	74		P.A. Now (θ)	74°
Sep first	22.3		Sep last	21.6		Sep. Now (ρ)	21.6"
Mag pri	11.28		Mag sec	12.30		delta mag (ΔM)	1.02		Spectral class	F2 (yellow-white)
Pri motion ra	-012		Sec motion ra	-023
Pri motion dec	-104		Sec motion dec	-098
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.12 (< 0.3, Physical double) This double is physical.

Precise pa

74.4

Precise sep

21.56

Constellation

Cygnus

Gaia DR2

26079227648

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20311+3847	SEI1150		1998	4	74	21.6	9.50	11.00		D	203105.25+384700.6
20311+3847	SEI1150		2002	6	74	21.6	11.28	12.30		N D	203105.27+384701.8
20311+3847	SEI1150		2010	7	75	21.6	11.28	12.30	F2	N	203105.27+384701.8
20311+3847	SEI1150		2015	8	74	21.6	11.28	12.30	F2	N	203105.27+384701.8

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