13129-5949 HDS 1850 Aa,Ab

Coord 2000	13129-5949		Discov num	HDS1850		Comp	Aa,Ab		Coord arcsec 2000	13 12 55.71 -59 48 58.8
Date first	1991		Date last	2021		Obs	12
Pa first	96		Pa last	102.3		P.A. Now (θ)	102.3°
Sep first	0.2		Sep last	0.14		Sep. Now (ρ)	0.14"
Mag pri	6.37		Mag sec	9.69		delta mag (ΔM)	3.32		Spectral class	G0V (yellow)
Pri motion ra	+008		Sec motion ra
Pri motion dec	-108		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		240653	13 12 56 -59 48 59	HDS 1850 Aa,Ab	2021	12	102	0.1	6.37	9.69	3.32	Y	<===
Show	HD 114630	240653	13 12 56 -59 48 59	COO 152 AB	2016	16	146	25.3	6.26	9.42	3.16

Triple system
2 estimated visually detectable stars in this system

Constellation	Centaurus		SAO	240653		HIP	64478		Tycho2	8661-01992-1
Gaia DR2	6061924645561038208		HD	114630		HR	4980		CD	CD-59 4623
CP	CP-59 4827		Distance	42.16		Distance ly	137.53

Period (P)	29.11y	± 0.34	Periastron (T)	1997.27y	± 1.55	Semi-major axis (a)	0.3134a	± 0.0034
Eccentricity (e)	0.173	± 0.018	Inclination (i)	89°	± 0.4	Longitude of periastron (ω)	326.4°	± 17.6
Node (Ω)	279.7°	± 0.2	Notes	n		Reference	Tok2016b
Equinox	2000		Last observation	2015		Grade	4	(1=Definitive, 9=Indet.)

label theta rho 2000 279.9 0.265 2001 280.3 0.246 2002 280.7 0.212 2003 281.2 0.166 2004 282.4 0.111 2005 286.0 0.052 2006 70.2 0.012 2007 95.0 0.072 2008 97.2 0.131 2009 98.0 0.186 2010 98.5 0.235 2011 98.8 0.277 2012 99.1 0.312 2013 99.3 0.337 2014 99.4 0.352 2015 99.6 0.357 2016 99.8 0.351 2017 100.0 0.333 2018 100.2 0.304 2019 100.4 0.263 2020 100.8 0.211 2021 101.5 0.149 2022 103.2 0.079 2023 146.7 0.007 2024 276.0 0.070 2025 278.1 0.139 2026 278.9 0.198 2027 279.3 0.240 2028 279.6 0.263 2029 279.9 0.265 2030 280.2 0.249		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic