15251-3810 RST 2955 AB

Coord 2000	15251-3810		Discov num	RST2955		Comp	AB		Coord arcsec 2000	15 25 06.45 -38 10 09.0
Date first	1934		Date last	2018		Obs	21
Pa first	230		Pa last	219.4		P.A. Now (θ)	219.4°
Sep first	0.2		Sep last	0.132		Sep. Now (ρ)	0.132"
Mag pri	8.10		Mag sec	7.63		delta mag (ΔM)	0.47		Spectral class	A2V (white)
Pri motion ra	-033		Sec motion ra
Pri motion dec	-013		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		206607	15 25 06 -38 10 09	RST 2955 AB	2018	21	219	0.1	8.10	7.63	0.47	Y	<===
Show	HD 137015	206607	15 25 06 -38 10 09	SKF 2021 AB,C	2015	13	70	120.5	7.06	8.45	1.39

Triple system
4 estimated visually detectable stars in this system

Constellation	Lupus		SAO	206607		HIP	75476		Tycho2	7835-00361-1
Gaia DR2	6006528088637041792		HD	137015		HR	5722		GC	20708
CD	CD-3710225		CP	CP-37 6486		Distance	152.67		Distance ly	498.01

Period (P)	510y		Periastron (T)	1998.1y		Semi-major axis (a)	0.427a
Eccentricity (e)	0.645		Inclination (i)	84.7°		Longitude of periastron (ω)	60.2°
Node (Ω)	226°		Notes			Reference	Tok2019d
Equinox	2000		Last observation	2018		Grade	4	(1=Definitive, 9=Indet.)

label theta rho 2000 239.1 0.058 2001 242.4 0.048 2002 247.4 0.038 2003 255.7 0.029 2004 271.7 0.020 2005 303.0 0.015 2006 342.2 0.017 2007 6.2 0.023 2008 18.2 0.032 2009 24.8 0.042 2010 28.9 0.052 2011 31.8 0.062 2012 33.8 0.072 2013 35.3 0.082 2014 36.5 0.092 2015 37.5 0.101 2016 38.3 0.111 2017 39.0 0.120 2018 39.6 0.129 2019 40.1 0.138 2020 40.5 0.147 2021 40.9 0.156 2022 41.3 0.164 2023 41.6 0.173 2024 41.9 0.181 2025 42.2 0.189 2026 42.4 0.197 2027 42.6 0.204 2028 42.8 0.212 2029 43.0 0.219 2030 43.2 0.226		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic