00465-0131 RST4157

Coord 2000	00465-0131		Discov num	RST4157		Comp			Coord arcsec 2000	00 46 31.18 -01 30 31.3
Date first	1939		Date last	2019		Obs	8
Pa first	95		Pa last	76		P.A. Now (θ)	77.3°
Sep first	0.3		Sep last	0.1		Sep. Now (ρ)	0.13"
Mag pri	10.00		Mag sec	10.00		delta mag (ΔM)	0		Spectral class	G0 (yellow)
Pri motion ra	+047		Sec motion ra
Pri motion dec	-027		Sec motion dec
Notes

Nature of this double is uncertain.

Precise pa	76.4		Precise sep	0.122		Constellation	Cetus		Tycho2	4673-00637-1
Gaia DR2	36580943488		HD	4424		last precise pa	76.4		last precise sep	0.122

Period (P)	94.8y		Periastron (T)	2008.2y		Semi-major axis (a)	0.161a
Eccentricity (e)	0.647		Inclination (i)	59°		Longitude of periastron (ω)	200.6°
Node (Ω)	97.8°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2019

label rho theta 2000 0.060 193.6 2001 0.057 204.9 2002 0.056 217.0 2003 0.056 229.4 2004 0.057 241.4 2005 0.059 252.8 2006 0.060 263.6 2007 0.059 274.5 2008 0.055 286.2 2009 0.049 300.4 2010 0.042 319.4 2011 0.038 344.3 2012 0.040 10.6 2013 0.047 31.5 2014 0.058 45.8 2015 0.069 55.5 2016 0.081 62.4 2017 0.093 67.5 2018 0.104 71.5 2019 0.115 74.7 2020 0.126 77.3 2021 0.136 79.6 2022 0.145 81.6 2023 0.154 83.3 2024 0.162 84.8 2025 0.170 86.2 2026 0.178 87.5 2027 0.185 88.7 2028 0.192 89.8 2029 0.198 90.8 2030 0.204 91.8 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
00465-0131	RST4157		1986	4	13	0.2	10.00	10.00	G0		004631.18-013031.3
00465-0131	RST4157		2008	5	114	0.1	10.00	10.00	G0		004631.18-013031.3
00465-0131	RST4157		2015	6	61	0.1	10.00	10.00	G0		004631.18-013031.3
00465-0131	RST4157		2018	7	74	0.1	10.00	10.00	G0		004631.18-013031.3
00465-0131	RST4157		2019	8	76	0.1	10.00	10.00	G0		004631.18-013031.3

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