20338+4540 A   740

Coord 2000	20338+4540		Discov num	A   740		Comp			Coord arcsec 2000	20 33 50.35 +45 39 41.2
Date first	1904		Date last	2016		Obs	16
Pa first	314		Pa last	313		P.A. Now (θ)	313°
Sep first	0.8		Sep last	0.8		Sep. Now (ρ)	0.8"
Mag pri	9.64		Mag sec	9.95		delta mag (ΔM)	0.31		Spectral class	O5V (blue)
Pri motion ra	+000		Sec motion ra	+000
Pri motion dec	-007		Sec motion dec	-007
Notes

Nature of this double is uncertain.

Precise pa	312.5		Precise sep	0.83		Constellation	Cygnus		SAO	49801
Tycho2	3573-00385-1		Gaia DR2	45679972096

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20338+4540	A 740		2007	13	313	0.9	9.64	9.95	O8		203350.35+453941.2
20338+4540	A 740		2009	14	314	0.8	9.64	9.95	O8		203350.35+453941.2
20338+4540	A 740		2016	16	313	0.8	9.64	9.95	O5V		203350.35+453941.2

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