00493-2124 BU  301AB

Coord 2000	00493-2124		Discov num	BU  301		Comp	AB		Coord arcsec 2000	00 49 18.31 -21 23 50.6
Date first	1891		Date last	2001		Obs	7
Pa first	319		Pa last	331		P.A. Now (θ)	331°
Sep first	0.9		Sep last	0.8		Sep. Now (ρ)	0.8"
Mag pri	8.89		Mag sec	12.53		delta mag (ΔM)	3.64		Spectral class	F3IV/V (yellow-white)
Pri motion ra	+038		Sec motion ra	+027
Pri motion dec	+009		Sec motion dec	+006
Notes

rPM=0.292 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		166603	00 49 18 -21 23 51	BU 301 AB	2001	7	331	0.8	8.89	12.53	3.64		<===
Show		166603	00 49 18 -21 23 51	BU 301 AC	2016	20	299	11.0	8.89	9.98	1.09

Triple system
3 visible stars in this system

Precise pa	330.5		Precise sep	0.81		Constellation	Hydra		SAO	166603
HIP	3845		Tycho2	5850-02582-1		Gaia DR2	2349697309661130624		HD	4731
BD	BD-22 138		Distance	125		Distance ly	407.75

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00493-2124	BU 301	AB	1991	6	333	0.9	8.89	12.53	F3IV/V		004918.31-212350.6
00493-2124	BU 301	AB	2001	7	331	0.8	8.89	12.53	F3IV/V		004918.31-212350.6

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