10163-2859 I   851

Coord 2000	10163-2859		Discov num	I   851		Comp			Coord arcsec 2000	10 16 18.88 -28 58 42.5
Date first	1910		Date last	2013		Obs	38
Pa first	222		Pa last	236		P.A. Now (θ)	232.1°
Sep first	0.5		Sep last	0.4		Sep. Now (ρ)	0.38"
Mag pri	9.62		Mag sec	7.96		delta mag (ΔM)	1.66		Spectral class	F3V (yellow-white)
Pri motion ra	-012		Sec motion ra	-012
Pri motion dec	-017		Sec motion dec	-017
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	235.6		Precise sep	0.384		Constellation	Antlia		SAO	178601
HIP	50309		Tycho2	6630-01496-1		Gaia DR2	86856740352		HD	89117
ADS	7706		CD	CD-28 8041		CP	CP-28 4058		Distance	147.06
Distance ly	479.71		last precise pa	235.6		last precise sep	0.384

Period (P)	117y		Periastron (T)	1953.9y		Semi-major axis (a)	0.216a
Eccentricity (e)	0.782		Inclination (i)	136°		Longitude of periastron (ω)	11°
Node (Ω)	63°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.373 240.6 2001 0.374 240.1 2002 0.376 239.7 2003 0.377 239.2 2004 0.379 238.8 2005 0.380 238.3 2006 0.380 237.9 2007 0.381 237.4 2008 0.381 237.0 2009 0.382 236.5 2010 0.382 236.1 2011 0.382 235.7 2012 0.382 235.2 2013 0.381 234.8 2014 0.381 234.3 2015 0.380 233.9 2016 0.379 233.4 2017 0.378 233.0 2018 0.377 232.5 2019 0.375 232.1 2020 0.374 231.6 2021 0.372 231.2 2022 0.370 230.7 2023 0.368 230.2 2024 0.366 229.7 2025 0.363 229.3 2026 0.361 228.8 2027 0.358 228.3 2028 0.355 227.8 2029 0.352 227.2 2030 0.348 226.7 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
10163-2859	I 851		1996	35	238	0.5	9.62	7.96	F3V	NOD	101618.88-285842.5
10163-2859	I 851		2009	36	237	0.4	9.62	7.96	F3V	NOD	101618.88-285842.5
10163-2859	I 851		2013	38	236	0.4	9.62	7.96	F3V	NOD	101618.88-285842.5

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