00378+7254 HJ 1989AB

Coord 2000	00378+7254		Discov num	HJ 1989		Comp	AB		Coord arcsec 2000	00 37 45.68 +72 53 41.5
Date first	1831		Date last	2015		Obs	8
Pa first	49		Pa last	52		P.A. Now (θ)	52°
Sep first	20.0		Sep last	31.8		Sep. Now (ρ)	31.8"
Mag pri	6.97		Mag sec	11.52		delta mag (ΔM)	4.55		Spectral class	B2V (blue-white)
Pri motion ra	+009		Sec motion ra	+003
Pri motion dec	-001		Sec motion dec	+003
Notes

rPM=0.796 Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		4165	00378+7254	HJ 1989	AB	1831	2015	8	52	31.8	6.97	11.52	4.55		<===
Show		4165	00378+7254	HJ 1989	BC	1831	2015	10	342	11.5	11.52	12.40	0.88

Triple system
3 visible stars in this system

Precise pa	51.5		Precise sep	31.834		Constellation	Cassiopeia		SAO	4165
HIP	2968		Tycho2	4303-00957-1		Gaia DR2	3739919488		HD	3366
BD	BD+72 35		Distance	473.93		Distance ly	1545.96

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00378+7254	HJ 1989	AB	1999	6	52	31.8	7.10	10.90	B2V	D	003745.68+725341.5
00378+7254	HJ 1989	AB	2003	8	51	32.1	7.10	10.90	B2V	D	003745.68+725341.5
00378+7254	HJ 1989	AB	2015	8	52	31.8	6.97	11.52	B2V		003745.68+725341.5

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