00345-0433 D     2AB

Coord 2000	00345-0433		Discov num	D     2		Comp	AB		Coord arcsec 2000	00 34 29.79 -04 32 47.5
Date first	1858		Date last	2015		Obs	69
Pa first	237		Pa last	71		P.A. Now (θ)	78.1°
Sep first	0.4		Sep last	0.2		Sep. Now (ρ)	0.25"
Mag pri	7.63		Mag sec	8.04		delta mag (ΔM)	0.41		Spectral class	G0IV (yellow)
Pri motion ra	+100		Sec motion ra	+085
Pri motion dec	+010		Sec motion dec	+005
Notes	N O (See Notes, Orbital solution)

This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00345-0433	D 2	AB	1858	2015	69	78	0.2	7.63	8.04	0.41	Y	<===
Show			00345-0433	STF 39	AB,C	1782	2010	55	44	16.6	7.10	8.65	1.55
Show			00345-0433	ALL 1	AB,D	1892	2010	9	159	203.0	7.10	9.99	2.89

Quadruple system
5 visible stars in this system

Constellation	Cetus		HIP	2713		Tycho2	4675-00561-1		HD	3125
ADS	475		BD	BD-05 83		Distance	77.46		Distance ly	252.67
last precise pa	70.7		last precise sep	0.19

Period (P)	2981y		Periastron (T)	2007y		Semi-major axis (a)	2.74a
Eccentricity (e)	0.923		Inclination (i)	77.5°		Longitude of periastron (ω)	80.2°
Node (Ω)	266°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.216 273.6 2001 0.195 275.4 2002 0.172 277.6 2003 0.149 280.6 2004 0.125 284.6 2005 0.101 290.6 2006 0.078 300.3 2007 0.058 317.4 2008 0.046 346.9 2009 0.051 20.7 2010 0.068 43.1 2011 0.090 55.5 2012 0.114 62.8 2013 0.139 67.6 2014 0.163 70.9 2015 0.187 73.4 2016 0.210 75.3 2017 0.233 76.8 2018 0.254 78.1 2019 0.275 79.2 2020 0.295 80.1 2021 0.314 80.9 2022 0.333 81.7 2023 0.351 82.3 2024 0.369 82.9 2025 0.385 83.4 2026 0.402 83.9 2027 0.418 84.4 2028 0.433 84.8 2029 0.448 85.2 2030 0.462 85.5 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
00345-0433	D 2	AB	1995	58	268	0.3	7.63	8.04	G1IV	OD	003429.75-043247.5
00345-0433	D 2	AB	2008	63	183	0.0	7.63	8.04	G1IV	OD	003429.75-043247.5
00345-0433	D 2	AB	2009	67	205	0.1	7.63	8.04	G1IV	NOD	003429.75-043247.5
00345-0433	D 2	AB	2011	68	48	0.1	7.63	8.04	G1IV	NOD	003429.75-043247.5
00345-0433	D 2	AB	2015	69	71	0.2	7.63	8.04	G0IV	NO	003429.75-043247.5

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