19557+4024 HJ  604

Coord 2000	19557+4024		Discov num	HJ  604		Comp			Coord arcsec 2000	19 55 44.76 +40 23 30.2
Date first	1893		Date last	2015		Obs	20
Pa first	94		Pa last	93		P.A. Now (θ)	93°
Sep first	70.5		Sep last	70.6		Sep. Now (ρ)	70.6"
Mag pri	7.35		Mag sec	9.33		delta mag (ΔM)	1.98		Spectral class	B1V (blue-white)
Pri motion ra	-003		Sec motion ra	-002
Pri motion dec	-007		Sec motion dec	-002
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.67 Nature of this double is uncertain.

Precise pa	92.6		Precise sep	70.612		Constellation	Cygnus		SAO	48983
HIP	98061		Tycho2	3141-03158-1		Gaia DR2	12917417600		HD	188891
BD	BD+40 3948		Distance	6250		Distance ly	20387.5

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19557+4024	HJ 604		2002	11	93	71.1	7.35	9.33	B1V	N D	195544.76+402330.2
19557+4024	HJ 604		2012	14	93	70.6	7.35	9.33	B1V	N D	195544.76+402330.2
19557+4024	HJ 604		2014	15	93	70.8	7.35	9.33	B1V	N	195544.76+402330.2
19557+4024	HJ 604		2015	17	93	70.6	7.35	9.33	B1V	N	195544.76+402330.2

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