20189+3945 COU2537

Coord 2000	20189+3945		Discov num	COU2537		Comp			Coord arcsec 2000	20 18 53.24 +39 45 09.5
Date first	1989		Date last	2008		Obs	3
Pa first	295		Pa last	294		P.A. Now (θ)	294°
Sep first	0.5		Sep last	0.8		Sep. Now (ρ)	0.8"
Mag pri	10.05		Mag sec	10.29		delta mag (ΔM)	0.24		Spectral class	B1III (blue-white)
Pri motion ra	-002		Sec motion ra	-002
Pri motion dec	-004		Sec motion dec	-004
Notes

Nature of this double is uncertain.

Precise pa	293.7		Precise sep	0.779		Constellation	Cygnus		SAO	69817
Tycho2	3155-00048-1		Gaia DR2	11992140800		HD	228875

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20189+3945	COU2537		1991	2	310	0.4	10.05	10.29	B1III		201853.24+394509.5
20189+3945	COU2537		2008	3	294	0.8	10.05	10.29	B1III		201853.24+394509.5

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