02321-1515 TOK 382Aa,Ab

Coord 2000	02321-1515		Discov num	TOK 382		Comp	Aa,Ab		Coord arcsec 2000	02 32 05.23 -15 14 40.6
Date first	2013		Date last	2020		Obs	8
Pa first	342		Pa last	199		P.A. Now (θ)	198.5°
Sep first	0.2		Sep last	0.6		Sep. Now (ρ)	0.56"
Mag pri	4.70		Mag sec	8.70		delta mag (ΔM)	4		Spectral class	F4IV (yellow-white)
Pri motion ra	-074		Sec motion ra
Pri motion dec	-122		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		148445	02 32 05 -15 14 41	TOK 382 Aa,Ab	2020	8	198	0.6	4.70	8.70	4.00	Y	<===
Show	Sig Cet	148445	02 32 05 -15 14 41	GWP 335 AB	1999	5	252	345.6	4.79	8.77	3.98

Triple system
2 visible stars in this system

Precise pa	199		Precise sep	0.554		Constellation	Cetus		SAO	148445
HIP	11783		Tycho2	5860-02587-1		Gaia DR2	5145955421492456960		HD	15798
HR	740		GC	3045		BD	BD-15 449		Flamsteed	76 Ceti
Flamsteed name	76 Cet		Distance	26.7		Distance ly	87.1		last precise pa	199
last precise sep	0.554

Period (P)	21y	± 1.9	Periastron (T)	2015.632y	± 0.062	Semi-major axis (a)	0.366a	± 0.012
Eccentricity (e)	0.858	± 0.016	Inclination (i)	120.4°	± 1.5	Longitude of periastron (ω)	24.3°	± 3
Node (Ω)	23.4°	± 1.6	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2021

label rho theta 2000 0.561 198.5 2001 0.597 196.8 2002 0.621 195.2 2003 0.635 193.6 2004 0.641 192.2 2005 0.637 190.7 2006 0.625 189.2 2007 0.604 187.6 2008 0.575 185.9 2009 0.537 184.0 2010 0.490 181.8 2011 0.433 178.9 2012 0.364 175.2 2013 0.281 169.4 2014 0.183 157.9 2015 0.076 113.7 2016 0.068 246.0 2017 0.246 213.4 2018 0.363 206.8 2019 0.448 203.2 2020 0.513 200.6 2021 0.561 198.5 2022 0.597 196.8 2023 0.621 195.2 2024 0.635 193.6 2025 0.641 192.2 2026 0.637 190.7 2027 0.625 189.2 2028 0.604 187.6 2029 0.575 185.9 2030 0.537 184.0		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
02321-1515	TOK 382	Aa,Ab	2013	1	342	0.2	4.70	8.70	F4IV		023205.23-151440.6
02321-1515	TOK 382	Aa,Ab	2014	3	338	0.2	4.70	8.70	F4IV		023205.23-151440.6
02321-1515	TOK 382	Aa,Ab	2017	5	29	0.3	4.70	8.70	F4IV	N	023205.23-151440.6
02321-1515	TOK 382	Aa,Ab	2018	6	204	0.4	4.70	8.70	F4IV	N	023205.23-151440.6
02321-1515	TOK 382	Aa,Ab	2019	7	201	0.5	4.70	8.70	F4IV	N	023205.23-151440.6

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