21307-3057 RSS 561AB

Coord 2000	21307-3057		Discov num	RSS 561		Comp	AB		Coord arcsec 2000	21 30 44.67 -30 57 20.8
Date first	1976		Date last	2015		Obs	4
Pa first	98		Pa last	98		P.A. Now (θ)	98°
Sep first	5.7		Sep last	5.3		Sep. Now (ρ)	5.3"
Mag pri	10.87		Mag sec	10.90		delta mag (ΔM)	0.03		Spectral class
Pri motion ra	+016		Sec motion ra
Pri motion dec	-215		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			21 30 45 -30 57 21	RSS 561 AB	2015	4	98	5.3	10.87	10.90	0.03		<===
Show			21 30 45 -30 57 21	TOK 636 AC	1999	2	125	930.0	10.87	17.78	6.91

Triple system
3 visible stars in this system

Precise pa	97.7		Precise sep	5.253		Constellation	Piscis Austrinus		HIP	106208
Tycho2	7474-00868-1		CD	CD-3118312		Distance	52.6		Distance ly	171.58

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21307-3057	RSS 561	AB	1999	3	98	5.2	10.87	10.90			213044.67-305720.8
21307-3057	RSS 561	AB	2010	4	99	4.9	10.87	10.90			213044.67-305720.8
21307-3057	RSS 561	AB	2015	4	98	5.3	10.87	10.90			213044.67-305720.8

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