01218-2408 SEE  13

Coord 2000	01218-2408		Discov num	SEE  13		Comp			Coord arcsec 2000	01 21 46.64 -24 07 41.0
Date first	1897		Date last	2008		Obs	30
Pa first	126		Pa last	175		P.A. Now (θ)	176.2°
Sep first	0.2		Sep last	1.2		Sep. Now (ρ)	1.32"
Mag pri	8.89		Mag sec	9.29		delta mag (ΔM)	0.4		Spectral class	G1V (yellow)
Pri motion ra	+073		Sec motion ra	+073
Pri motion dec	+027		Sec motion dec	+027
Notes	N O (See Notes, Orbital solution)

This double is physical.

Constellation	Cetus		SAO	166988		HIP	6367		Tycho2	6425-01613-1
HD	8281		ADS	1102		CD	CD-24 588		CP	CP-24 155
Distance	86.06		Distance ly	280.73		last precise pa	175.4		last precise sep	1.229

Period (P)	1530.34y		Periastron (T)	1846.51y		Semi-major axis (a)	2.021a
Eccentricity (e)	0.9		Inclination (i)	67.2°		Longitude of periastron (ω)	148.1°
Node (Ω)	207°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1991

label rho theta 2000 1.197 174.4 2001 1.204 174.5 2002 1.211 174.6 2003 1.218 174.7 2004 1.225 174.8 2005 1.232 174.9 2006 1.239 175.0 2007 1.246 175.2 2008 1.253 175.3 2009 1.260 175.4 2010 1.267 175.5 2011 1.273 175.6 2012 1.280 175.7 2013 1.287 175.8 2014 1.294 175.9 2015 1.301 176.0 2016 1.308 176.0 2017 1.314 176.1 2018 1.321 176.2 2019 1.328 176.3 2020 1.335 176.4 2021 1.341 176.5 2022 1.348 176.6 2023 1.355 176.7 2024 1.361 176.8 2025 1.368 176.9 2026 1.375 177.0 2027 1.381 177.0 2028 1.388 177.1 2029 1.394 177.2 2030 1.401 177.3 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
01218-2408	SEE 13		2006	28	179	1.0	8.89	9.29	G1V	NOD	012146.64-240741.0
01218-2408	SEE 13		2008	29	175	1.2	8.89	9.29	G1V	NOD	012146.64-240741.0

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