00026-0829 A   428

Coord 2000	00026-0829		Discov num	A   428		Comp			Coord arcsec 2000	00 02 38.92 -08 29 16.6
Date first	1902		Date last	2018		Obs	43
Pa first	111		Pa last	295		P.A. Now (θ)	279.1°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.1"
Mag pri	9.82		Mag sec	10.07		delta mag (ΔM)	0.25		Spectral class	G0 (yellow)
Pri motion ra	+000		Sec motion ra
Pri motion dec	-003		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

Precise pa	294.6		Precise sep	0.111		Constellation	Cetus		HIP	210
Tycho2	5260-00354-1		Gaia DR2	24679584896		HD	225015		ADS	4
BD	BD-09 6310		Distance	134.77		Distance ly	439.62		last precise pa	294.6
last precise sep	0.111

Period (P)	414.95y	± 20.96	Periastron (T)	2005.35y	± 2.47	Semi-major axis (a)	0.505a	± 0.021
Eccentricity (e)	0.503	± 0.013	Inclination (i)	111.9°	± 1.2	Longitude of periastron (ω)	226.8°	± 4.2
Node (Ω)	192.2°	± 2	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2014

label rho theta 2000 0.224 359.7 2001 0.217 358.2 2002 0.210 356.7 2003 0.203 355.0 2004 0.195 353.2 2005 0.188 351.3 2006 0.180 349.1 2007 0.172 346.8 2008 0.164 344.3 2009 0.156 341.5 2010 0.149 338.5 2011 0.141 335.1 2012 0.134 331.3 2013 0.127 327.1 2014 0.121 322.5 2015 0.115 317.3 2016 0.111 311.8 2017 0.107 305.7 2018 0.104 299.3 2019 0.103 292.6 2020 0.103 285.8 2021 0.104 279.1 2022 0.106 272.6 2023 0.109 266.4 2024 0.114 260.7 2025 0.119 255.5 2026 0.126 250.7 2027 0.132 246.4 2028 0.140 242.6 2029 0.148 239.1 2030 0.156 236.0 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
00026-0829	A 428		1991	39	13	0.3	9.82	10.07	G0	NO	000238.92-082916.6
00026-0829	A 428		2007	40	345	0.2	9.82	10.07	G0	NO	000238.92-082916.6
00026-0829	A 428		2014	42	316	0.1	9.82	10.07	G0	O	000238.92-082916.6
00026-0829	A 428		2018	43	295	0.1	9.82	10.07	G0	O	000238.92-082916.6

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