15251-2340 RST 2957 (HD 137153)

15^h 25^m 07.67^s -23° 40' 16.2" P.A. 99.00 sep 0.1 mag 9.26,9.47 Sp G2V dist. 65.23 pc (212.78 l.y.)

Coord 2000	15251-2340		Discov num	RST2957		Comp			Coord arcsec 2000	15 25 07.67 -23 40 16.2
Date first	1935		Date last	2021		Obs	18
Pa first	271		Pa last	99		P.A. Now (θ)	104.6°
Sep first	0.3		Sep last	0.108		Sep. Now (ρ)	0.062"
Mag pri	9.26		Mag sec	9.47		delta mag (ΔM)	0.21		Spectral class	G2V (yellow)
Pri motion ra	-022		Sec motion ra
Pri motion dec	-037		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Name	HD 137153		Constellation	Libra		SAO	183450		HIP	75478
Tycho2	6763-01616-1		Gaia DR2	6251157365544073472		HD	137153		CD	CD-2312272
CP	CP-23 6171		Distance	65.23		Distance ly	212.78

ORBITAL ELEMENTS

Period (P)	53.52y	± 6.57	Periastron (T)	2020.795y	± 0.722	Semi-major axis (a)	0.2762a	± 0.0076
Eccentricity (e)	0.85	± 0.086	Inclination (i)	86°	± 0.6	Longitude of periastron (ω)	302°
Node (Ω)	96.4°	± 1.3	Notes			Reference	Tok2016e
Equinox	2000		Last observation			Grade	3	(1=Definitive, 9=Indet.)

label	theta	rho
2000	271.4	0.307
2001	271.6	0.311
2002	271.7	0.314
2003	271.9	0.316
2004	272.1	0.317
2005	272.3	0.317
2006	272.5	0.316
2007	272.7	0.314
2008	272.9	0.311
2009	273.1	0.306
2010	273.3	0.300
2011	273.5	0.293
2012	273.7	0.284
2013	274.0	0.272
2014	274.2	0.259
2015	274.5	0.242
2016	274.9	0.221
2017	275.3	0.196
2018	275.9	0.164
2019	276.9	0.120
2020	279.5	0.056
2021	94.4	0.039
2022	100.2	0.067
2023	104.6	0.062
2024	110.7	0.049
2025	121.6	0.035
2026	145.5	0.023
2027	192.7	0.020
2028	228.7	0.029
2029	244.3	0.043
2030	251.9	0.058

grafico orbita

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

wds15251-2340a.png orbit plot

Measures: green=micrometric, blue=interferometric, purple=photographic