00310-1005 HJ 1981A,BC

Coord 2000	00310-1005		Discov num	HJ 1981		Comp	A,BC		Coord arcsec 2000	00 30 59.89 -10 05 04.9
Date first	1830		Date last	2015		Obs	27
Pa first	85		Pa last	89		P.A. Now (θ)	89°
Sep first	60.0		Sep last	78.4		Sep. Now (ρ)	78.4"
Mag pri	6.91		Mag sec	8.43		delta mag (ΔM)	1.52		Spectral class	A5IV-V (white)
Pri motion ra	-029		Sec motion ra	-034
Pri motion dec	-020		Sec motion dec	-035
Notes	Z W (Parallax indicates components are physical, )

rPM=0.324 This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		147317	00 30 60 -10 05 05	HJ 1981 A,BC	2015	27	89	78.4	6.91	8.43	1.52		<===
Show		147318	00 31 05 -10 05 02	BU 1158 BC	2017	36	326	0.5	9.69	9.09	0.60	Y

Triple system
4 visible stars in this system

Precise pa	88.7		Precise sep	78.37		Constellation	Cetus		SAO	147317
HIP	2431		Tycho2	5269-02391-1		Gaia DR2	2426456896455853440		HD	2760
BD	BD-10 89		Distance	148.81		Distance ly	485.42

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00310-1005	HJ 1981	A,BC	2001	22	88	78.0	6.91	8.43	A5IV-V	NZD	003059.89-100504.9
00310-1005	HJ 1981	A,BC	2010	24	88	78.5	6.91	8.43	A5IV-V	NZD	003059.89-100504.9
00310-1005	HJ 1981	A,BC	2012	26	90	78.7	6.91	8.43	A5IV-V	Z	003059.89-100504.9
00310-1005	HJ 1981	A,BC	2015	27	89	78.4	6.91	8.43	A5IV-V	ZW	003059.89-100504.9

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