20318+4933 BU 1136

Coord 2000	20318+4933		Discov num	BU 1136		Comp			Coord arcsec 2000	20 31 46.51 +49 32 32.5
Date first	1889		Date last	2016		Obs	16
Pa first	207		Pa last	215		P.A. Now (θ)	215°
Sep first	0.4		Sep last	0.7		Sep. Now (ρ)	0.7"
Mag pri	7.75		Mag sec	9.19		delta mag (ΔM)	1.44		Spectral class	B9 (blue-white)
Pri motion ra	+006		Sec motion ra	+006
Pri motion dec	+008		Sec motion dec	+008
Notes

Nature of this double is uncertain.

Precise pa	215		Precise sep	0.66		Constellation	Cygnus		SAO	49754
HIP	101284		Tycho2	3581-01451-1		Gaia DR2	83451898880		HD	195853
BD	BD+49 3305		Distance	197.63		Distance ly	644.67

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20318+4933	BU 1136		2005	14	218	0.6	7.75	9.19	B9	D	203146.51+493232.5
20318+4933	BU 1136		2007	15	215	0.6	7.75	9.19	B9	D	203146.51+493232.5
20318+4933	BU 1136		2016	16	215	0.7	7.75	9.19	B9		203146.51+493232.5

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