19577+3509 SEI 747

Coord 2000	19577+3509		Discov num	SEI 747		Comp			Coord arcsec 2000	19 57 42.44 +35 08 42.5
Date first	1894		Date last	2010		Obs	4
Pa first	169		Pa last	175		P.A. Now (θ)	175°
Sep first	18.8		Sep last	19.4		Sep. Now (ρ)	19.4"
Mag pri	13.66		Mag sec	14.23		delta mag (ΔM)	0.57		Spectral class
Pri motion ra	-001		Sec motion ra	-004
Pri motion dec	-003		Sec motion dec	-004
Notes

rPM=0.559 Nature of this double is uncertain.

Precise pa	174.5		Precise sep	19.4		Constellation	Cygnus		last precise pa	174.5
last precise sep	19.4

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19577+3509	SEI 747		1998	2	174	19.6	13.40	13.92		D	195742.44+350842.5
19577+3509	SEI 747		2002	3	174	19.6	13.40	13.92		D	195742.44+350842.5
19577+3509	SEI 747		2010	4	174	19.4	13.66	14.23			195742.44+350842.5

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