00521-1314 HU  201

Coord 2000	00521-1314		Discov num	HU  201		Comp			Coord arcsec 2000	00 52 07.81 -13 13 50.0
Date first	1900		Date last	2018		Obs	48
Pa first	129		Pa last	122		P.A. Now (θ)	121.9°
Sep first	0.6		Sep last	0.8		Sep. Now (ρ)	0.84"
Mag pri	10.09		Mag sec	10.47		delta mag (ΔM)	0.38		Spectral class	K1V (yellow-orange)
Pri motion ra	+077		Sec motion ra	+077
Pri motion dec	-093		Sec motion dec	-093
Notes	O (Orbital solution)

This double is physical.

Precise pa	122.1		Precise sep	0.847		Constellation	Cetus		SAO	147487
HIP	4066		Tycho2	5272-01666-1		Gaia DR2	76375375104		HD	5041
ADS	713		BD	BD-14 152		Distance	60.94		Distance ly	198.79
last precise pa	122.1		last precise sep	0.847

Period (P)	128.9y		Periastron (T)	1932.97y		Semi-major axis (a)	0.542a
Eccentricity (e)	0.688		Inclination (i)	44.1°		Longitude of periastron (ω)	160°
Node (Ω)	124.6°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2008

label rho theta 2000 0.892 111.3 2001 0.893 111.9 2002 0.893 112.4 2003 0.893 113.0 2004 0.893 113.5 2005 0.892 114.0 2006 0.891 114.6 2007 0.889 115.1 2008 0.887 115.6 2009 0.885 116.2 2010 0.882 116.7 2011 0.879 117.3 2012 0.876 117.8 2013 0.872 118.4 2014 0.868 119.0 2015 0.863 119.5 2016 0.858 120.1 2017 0.852 120.7 2018 0.846 121.3 2019 0.840 121.9 2020 0.833 122.5 2021 0.826 123.1 2022 0.818 123.8 2023 0.810 124.4 2024 0.801 125.1 2025 0.792 125.7 2026 0.783 126.4 2027 0.772 127.1 2028 0.762 127.9 2029 0.751 128.6 2030 0.739 129.4 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
00521-1314	HU 201		1994	45	108	0.9	10.09	10.47	K1V	NOD	005207.81-131350.0
00521-1314	HU 201		2008	46	116	0.9	10.09	10.47	K1V	NOD	005207.81-131350.0
00521-1314	HU 201		2015	47	120	0.8	10.09	10.47	K1V	O	005207.81-131350.0

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