20042+3728 ALI 654

Coord 2000	20042+3728		Discov num	ALI 654		Comp			Coord arcsec 2000	20 04 06.30 +37 27 59.8
Date first	1929		Date last	2015		Obs	9
Pa first	350		Pa last	351		P.A. Now (θ)	351°
Sep first	11.6		Sep last	10.9		Sep. Now (ρ)	10.9"
Mag pri	9.03		Mag sec	12.60		delta mag (ΔM)	3.57		Spectral class	B9 (blue-white)
Pri motion ra	-002		Sec motion ra	-005
Pri motion dec	-005		Sec motion dec	+001
Notes

rPM=1.246 This double is not physical.

Precise pa	351.3		Precise sep	10.945		Constellation	Cygnus		SAO	69349
Tycho2	2682-00072-1		Gaia DR2	90504316544		HD	190550

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20042+3728	ALI 654		1998	2	352	11.0	9.03	12.60		D	200406.30+372759.8
20042+3728	ALI 654		2002	3	351	11.0	9.03	12.60		D	200406.30+372759.8
20042+3728	ALI 654		2010	4	350	11.4	9.03	12.60	B9		200406.30+372759.8
20042+3728	ALI 654		2015	5	351	11.0	9.03	12.60	B9		200406.30+372759.8

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