00031+6942 BU  861AD

Coord 2000	00031+6942		Discov num	BU  861		Comp	AD		Coord arcsec 2000	00 03 04.97 +69 42 07.4
Date first	1907		Date last	2015		Obs	5
Pa first	273		Pa last	273		P.A. Now (θ)	273°
Sep first	16.8		Sep last	20.1		Sep. Now (ρ)	20.1"
Mag pri	11.31		Mag sec	15.60		delta mag (ΔM)	4.29		Spectral class
Pri motion ra	+031		Sec motion ra
Pri motion dec	+007		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00 03 05 +69 42 07	BU 861 AB	2016	16	177	1.6	11.31	11.53	0.22
Show			00 03 05 +69 42 07	BU 861 AC	2015	6	39	14.0	11.31	13.70	2.39
Show			00 03 05 +69 42 07	BU 861 AD	2015	5	273	20.1	11.31	15.60	4.29		<===

Quadruple system
4 visible stars in this system

Precise pa	272.5		Precise sep	20.083		Constellation	Hydra		Tycho2	4298-00695-1
Gaia DR2	530704202255102720

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00031+6942	BU 861	AD	1999	3	275	19.7	11.31	15.60		D	000304.97+694207.4
00031+6942	BU 861	AD	2003	4	275	19.7	11.31	15.60		D	000304.97+694207.4
00031+6942	BU 861	AD	2015	5	273	20.1	11.31	15.60			000304.97+694207.4

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