09100-2845 B   179

Coord 2000	09100-2845		Discov num	B   179		Comp			Coord arcsec 2000	09 09 57.24 -28 45 20.7
Date first	1927		Date last	2015		Obs	34
Pa first	161		Pa last	148		P.A. Now (θ)	124°
Sep first	0.4		Sep last	0.3		Sep. Now (ρ)	0.1"
Mag pri	9.44		Mag sec	9.64		delta mag (ΔM)	0.2		Spectral class	K0V (yellow-orange)
Pri motion ra	-013		Sec motion ra	-013
Pri motion dec	-077		Sec motion dec	-077
Notes	O (Orbital solution)

This double is physical.

Constellation	Pyxis		SAO	177059		HIP	45003		Tycho2	6598-01373-1
HD	78921		ADS	7223		CD	CD-28 6981		CP	CP-28 3635
Distance	55.9		Distance ly	182.35		last precise pa	147.8		last precise sep	0.271

Period (P)	83.79y		Periastron (T)	2019.3y		Semi-major axis (a)	0.47a
Eccentricity (e)	0.816		Inclination (i)	116.4°		Longitude of periastron (ω)	115.6°
Node (Ω)	146.6°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2011

label rho theta 2000 0.525 170.2 2001 0.519 169.3 2002 0.512 168.4 2003 0.504 167.5 2004 0.494 166.5 2005 0.484 165.5 2006 0.472 164.4 2007 0.459 163.3 2008 0.444 162.1 2009 0.427 160.8 2010 0.409 159.4 2011 0.387 157.9 2012 0.363 156.1 2013 0.336 154.1 2014 0.304 151.8 2015 0.267 148.8 2016 0.223 144.7 2017 0.168 138.3 2018 0.100 124.0 2019 0.040 47.5 2020 0.096 334.9 2021 0.139 317.4 2022 0.160 306.5 2023 0.173 297.8 2024 0.183 290.1 2025 0.190 283.1 2026 0.197 276.6 2027 0.204 270.5 2028 0.211 264.8 2029 0.218 259.5 2030 0.226 254.5 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
09100-2845	B 179		1998	29	349	0.4	9.44	9.64	K0V	NOD	090957.24-284520.7
09100-2845	B 179		2009	30	160	0.4	9.44	9.64	K0V	NOD	090957.24-284520.7
09100-2845	B 179		2010	31	159	0.4	9.44	9.64	K0V	NOD	090957.24-284520.7
09100-2845	B 179		2011	32	158	0.4	9.44	9.64	K0V	NOD	090957.24-284520.7
09100-2845	B 179		2013	33	155	0.3	9.44	9.64	K0V	NOD	090957.24-284520.7
09100-2845	B 179		2015	34	148	0.3	9.44	9.64	K0V	O	090957.24-284520.7

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