00310+2839 HAU   2AB

Coord 2000	00310+2839		Discov num	HAU   2		Comp	AB		Coord arcsec 2000	00 31 00.57 +28 42 10.5
Date first	1894		Date last	2016		Obs	12
Pa first	282		Pa last	279		P.A. Now (θ)	279°
Sep first	12.2		Sep last	12.4		Sep. Now (ρ)	12.4"
Mag pri	11.29		Mag sec	11.84		delta mag (ΔM)	0.55		Spectral class
Pri motion ra	+003		Sec motion ra	+003
Pri motion dec	-002		Sec motion dec	-003
Notes

rPM=0.236 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		74055	00310+2839	CTU 1	Aa,Ab	2003	2005	3	226	0.9	9.40	11.20	1.80
Show		74055	00310+2839	HAU 2	AB	1894	2016	12	279	12.4	11.29	11.84	0.55		<===

Triple system
2 visible stars in this system

Precise pa	279.4		Precise sep	12.36		Constellation	Andromeda		SAO	74055
Tycho2	1737-01119-1		Gaia DR2	2857921820589139072

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00310+2839	HAU 2	AB	2005	9	279	12.5	11.29	11.84		D	003100.57+284210.5
00310+2839	HAU 2	AB	2010	11	279	12.2	11.29	11.84			003100.57+284210.5
00310+2839	HAU 2	AB	2016	11	279	12.4	11.29	11.84			003100.57+284210.5

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