00219-2300 HJ 1957A,BC

Coord 2000	00219-2300		Discov num	HJ 1957		Comp	A,BC		Coord arcsec 2000	00 21 52.40 -23 00 27.7
Date first	1830		Date last	2016		Obs	44
Pa first	18		Pa last	27		P.A. Now (θ)	27°
Sep first	8.5		Sep last	6.1		Sep. Now (ρ)	6.1"
Mag pri	7.67		Mag sec	9.15		delta mag (ΔM)	1.48		Spectral class	G0 (yellow)
Pri motion ra	+133		Sec motion ra	+133
Pri motion dec	-115		Sec motion dec	-115
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		166213	00 21 52 -23 00 28	HJ 1957 A,BC	2016	44	27	6.1	7.67	9.15	1.48		<===
Show		166213	00 21 53 -23 00 23	RST 5493 BC	2020	13	92	0.1	9.90	9.90	0.00	Y

Triple system
4 visible stars in this system

Precise pa	26.6		Precise sep	6.095		Constellation	Hydra		SAO	166213
HIP	1732		Tycho2	6413-00769-1		Gaia DR2	2360329587101891200		HD	1766
CD	CD-23 111		Distance	59.49		Distance ly	194.06

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00219-2300	HJ 1957	A,BC	1999	40	26	6.0	7.67	9.15	G0	D	002152.40-230027.7
00219-2300	HJ 1957	A,BC	2015	42	52	6.0	7.67	9.15	G0	N	002152.40-230027.7

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