02166-5026 TOK 185

Coord 2000	02166-5026		Discov num	TOK 185		Comp			Coord arcsec 2000	02 16 36.08 -50 25 42.8
Date first	2011		Date last	2019		Obs	16
Pa first	201		Pa last	127		P.A. Now (θ)	118.3°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.09"
Mag pri	9.90		Mag sec	9.90		delta mag (ΔM)	0		Spectral class	G5V (yellow)
Pri motion ra	-073		Sec motion ra
Pri motion dec	-138		Sec motion dec
Notes	O (Orbital solution)

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

Precise pa	126.6		Precise sep	0.077		Constellation	Eridanus		SAO	232697
HIP	10611		Tycho2	8055-00034-1		Gaia DR2	97305873792		HD	14239
CD	CD-51 558		CP	CP-51 298		Distance	59.35		Distance ly	193.6
last precise pa	126.6		last precise sep	0.077

Period (P)	11.29y	± 0.46	Periastron (T)	2014.17y	± 0.36	Semi-major axis (a)	0.0908a	± 0.002
Eccentricity (e)	0.066	± 0.031	Inclination (i)	45.3°	± 1.9	Longitude of periastron (ω)	31.8°	± 10.7
Node (Ω)	270.4°	± 4.8	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox			Last observation	2018

label rho theta 2000 0.069 210.8 2001 0.080 244.2 2002 0.086 270.3 2003 0.077 297.6 2004 0.063 335.9 2005 0.065 23.4 2006 0.081 58.6 2007 0.094 82.3 2008 0.094 102.6 2009 0.083 125.6 2010 0.070 157.7 2011 0.067 199.2 2012 0.077 235.6 2013 0.085 263.0 2014 0.081 289.0 2015 0.067 323.2 2016 0.062 10.1 2017 0.076 50.0 2018 0.091 76.1 2019 0.096 96.7 2020 0.087 118.3 2021 0.073 147.1 2022 0.066 186.9 2023 0.074 226.2 2024 0.084 255.6 2025 0.084 281.1 2026 0.071 311.8 2027 0.061 356.0 2028 0.071 40.2 2029 0.088 69.4 2030 0.096 90.9 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
02166-5026	TOK 185		2011	2	17	0.1	9.90	9.90	G5V		021636.08-502542.8
02166-5026	TOK 185		2013	5	284	0.1	9.90	9.90	G5V		021636.08-502542.8
02166-5026	TOK 185		2015	7	324	0.1	9.90	9.90	G5V	O	021636.08-502542.8
02166-5026	TOK 185		2017	12	70	0.1	9.90	9.90	G5V	O	021636.08-502542.8
02166-5026	TOK 185		2018	14	93	0.1	9.90	9.90	G5V	O	021636.08-502542.8
02166-5026	TOK 185		2019	16	127	0.1	9.90	9.90	G5V	O	021636.08-502542.8

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