01337-1213 HWE   4

Coord 2000	01337-1213		Discov num	HWE   4		Comp			Coord arcsec 2000	01 33 42.39 -12 12 46.1
Date first	1877		Date last	2013		Obs	57
Pa first	328		Pa last	331		P.A. Now (θ)	330°
Sep first	0.9		Sep last	0.9		Sep. Now (ρ)	0.87"
Mag pri	9.23		Mag sec	9.31		delta mag (ΔM)	0.08		Spectral class	G3V (yellow)
Pri motion ra	-011		Sec motion ra	-011
Pri motion dec	-009		Sec motion dec	-009
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	331.3		Precise sep	0.869		Constellation	Cetus		SAO	147882
HIP	7274		Tycho2	5279-00225-1		HD	9575		ADS	1223
BD	BD-12 286		Distance	66.62		Distance ly	217.31		last precise pa	331.3
last precise sep	0.869

Period (P)	142.42y		Periastron (T)	2065.92y		Semi-major axis (a)	0.571a
Eccentricity (e)	0.837		Inclination (i)	118.6°		Longitude of periastron (ω)	318.6°
Node (Ω)	133.7°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.869 335.0 2001 0.871 334.8 2002 0.873 334.5 2003 0.875 334.2 2004 0.876 333.9 2005 0.877 333.6 2006 0.878 333.3 2007 0.878 333.1 2008 0.878 332.8 2009 0.878 332.5 2010 0.878 332.2 2011 0.878 332.0 2012 0.877 331.7 2013 0.875 331.4 2014 0.874 331.1 2015 0.872 330.8 2016 0.870 330.5 2017 0.868 330.3 2018 0.865 330.0 2019 0.862 329.7 2020 0.859 329.4 2021 0.855 329.1 2022 0.851 328.8 2023 0.847 328.5 2024 0.842 328.2 2025 0.837 327.9 2026 0.831 327.6 2027 0.826 327.3 2028 0.819 326.9 2029 0.813 326.6 2030 0.806 326.3 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
01337-1213	HWE 4		2003	52	334	0.8	9.23	9.31	G3V	NOD	013342.39-121246.1
01337-1213	HWE 4		2008	54	333	0.9	9.23	9.31	G3V	NOD	013342.39-121246.1
01337-1213	HWE 4		2009	55	332	0.8	9.23	9.31	G3V	NOD	013342.39-121246.1
01337-1213	HWE 4		2013	57	331	0.9	9.23	9.31	G3V	NO	013342.39-121246.1

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