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	2019		Obs	38
Pa first	161		Pa last	132		P.A. Now (θ)	112.7°
Sep first	0.4		Sep last	0.2		Sep. Now (ρ)	0.12"
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)

Visually invisible, K-band or other infrared star This double is physical.

Precise pa	132.3		Precise sep	0.178		Constellation	Pyxis		SAO	177059
HIP	45003		Tycho2	6598-01373-1		Gaia DR2	16217477504		HD	78921
ADS	7223		CD	CD-28 6981		CP	CP-28 3635		Distance	55.9
Distance ly	182.35		last precise pa	132.3		last precise sep	0.178

Period (P)	80.35y	± 0.84	Periastron (T)	2026.88y	± 0.62	Semi-major axis (a)	0.372a	± 0.006
Eccentricity (e)	0.562	± 0.025	Inclination (i)	116.3°	± 1.3	Longitude of periastron (ω)	158.5°	± 3
Node (Ω)	169.4°	± 1.1	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox			Last observation	2018

label rho theta 2000 0.534 169.5 2001 0.526 168.7 2002 0.518 167.8 2003 0.508 167.0 2004 0.497 166.1 2005 0.485 165.1 2006 0.472 164.1 2007 0.458 163.1 2008 0.442 161.9 2009 0.425 160.7 2010 0.407 159.4 2011 0.388 158.0 2012 0.367 156.4 2013 0.344 154.6 2014 0.321 152.5 2015 0.295 150.1 2016 0.268 147.3 2017 0.240 143.7 2018 0.211 139.3 2019 0.181 133.3 2020 0.151 125.0 2021 0.123 112.7 2022 0.101 94.3 2023 0.092 69.2 2024 0.098 43.1 2025 0.116 22.9 2026 0.138 8.7 2027 0.156 358.2 2028 0.167 349.5 2029 0.171 341.6 2030 0.168 333.7 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
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
09100-2845	B 179		2016	35	144	0.2	9.44	9.64	K0V	O	090957.24-284520.7
09100-2845	B 179		2018	37	139	0.2	9.44	9.64	K0V	O	090957.24-284520.7
09100-2845	B 179		2019	38	132	0.2	9.44	9.64	K0V	O	090957.24-284520.7

If you need more information about this double, apply for a data request form to the WDS.