19417+3855 SEI 660

Coord 2000	19417+3855		Discov num	SEI 660		Comp			Coord arcsec 2000	19 41 39.06 +38 54 49.2
Date first	1896		Date last	2015		Obs	10
Pa first	250		Pa last	253		P.A. Now (θ)	253°
Sep first	11.8		Sep last	11.8		Sep. Now (ρ)	11.8"
Mag pri	9.77		Mag sec	12.60		delta mag (ΔM)	2.83		Spectral class	A0 (white)
Pri motion ra	-001		Sec motion ra	-003
Pri motion dec	-003		Sec motion dec	+001
Notes

rPM=1.414 This double is not physical.

Precise pa	252.5		Precise sep	11.817		Constellation	Cygnus		SAO	68707
Tycho2	3136-00770-1		Gaia DR2	86975586688		HD	225418

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19417+3855	SEI 660		1998	4	253	11.8	9.77	12.60	A0	D	194139.06+385449.2
19417+3855	SEI 660		2002	5	253	11.8	9.77	12.60	A0	D	194139.06+385449.2
19417+3855	SEI 660		2010	6	253	11.3	9.77	12.60	A0		194139.06+385449.2
19417+3855	SEI 660		2015	10	253	11.8	9.77	12.60	A0		194139.06+385449.2

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