01263-0440 TOK 204 Aa,Ab

Coord 2000	01263-0440		Discov num	TOK 204		Comp	Aa,Ab		Coord arcsec 2000	01 26 19.20 -04 40 26.7
Date first	2011		Date last	2021		Obs	16
Pa first	6		Pa last	242.1		P.A. Now (θ)	333°
Sep first	0.1		Sep last	0.043		Sep. Now (ρ)	0.077"
Mag pri	8.50		Mag sec	10.00		delta mag (ΔM)	1.5		Spectral class	G5 (yellow)
Pri motion ra	-097		Sec motion ra
Pri motion dec	-103		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		129296	01 26 19 -04 40 27	TOK 204 Aa,Ab	2021	16	242	0.0	8.50	10.00	1.50	Y	<===
Show		129296	01 26 19 -04 40 27	TOK 204 AB	2015	5	227	24.6	8.20	17.50	9.30

Triple system
2 estimated visually detectable stars in this system

Constellation	Cetus		SAO	129296		HIP	6712		Tycho2	4684-00546-1
Gaia DR2	2482274463233174016		HD	8765		BD	BD-05 258		Distance	52.97
Distance ly	172.79

Period (P)	6.12y		Periastron (T)	2015.457y		Semi-major axis (a)	0.073a
Eccentricity (e)	0.416		Inclination (i)	20.8°		Longitude of periastron (ω)	157.5°
Node (Ω)	45.6°		Notes			Reference	Tok2018i
Equinox	2000		Last observation	2018		Grade	3	(1=Definitive, 9=Indet.)

label theta rho 2000 20.4 0.102 2001 46.4 0.098 2002 81.9 0.074 2003 172.0 0.043 2004 294.9 0.058 2005 347.5 0.086 2006 17.3 0.101 2007 43.1 0.099 2008 76.4 0.078 2009 155.2 0.045 2010 284.8 0.055 2011 343.0 0.083 2012 14.2 0.100 2013 39.9 0.100 2014 71.3 0.081 2015 140.1 0.048 2016 273.5 0.052 2017 338.2 0.080 2018 10.9 0.099 2019 36.7 0.101 2020 66.7 0.085 2021 126.9 0.051 2022 260.7 0.049 2023 333.0 0.077 2024 7.6 0.097 2025 33.7 0.102 2026 62.4 0.088 2027 115.6 0.055 2028 246.5 0.046 2029 327.3 0.073 2030 4.2 0.096		Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic