01017+2518 HDS 134

Coord 2000	01017+2518		Discov num	HDS 134		Comp			Coord arcsec 2000	01 01 43.49 +25 17 32.1
Date first	1991		Date last	2010		Obs	32
Pa first	188		Pa last	215		P.A. Now (θ)	259.3°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.11"
Mag pri	7.48		Mag sec	7.76		delta mag (ΔM)	0.28		Spectral class	G8IV+G8IV (yellow/yellow)
Pri motion ra	+136		Sec motion ra
Pri motion dec	-013		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Precise pa	214.8		Precise sep	0.138		Constellation	Pisces		SAO	74439
HIP	4809		Tycho2	1743-01174-1		HD	6009		BD	BD+24 163
Distance	71.07		Distance ly	231.83		last precise pa	214.8		last precise sep	0.138

Period (P)	16.41y	± 0.11	Periastron (T)	1998.62y	± 0.02	Semi-major axis (a)	0.128a	± 0.002
Eccentricity (e)	0.393	± 0.012	Inclination (i)	58.4°	± 0.5	Longitude of periastron (ω)	106.9°	± 0.6
Node (Ω)	57.1°	± 0.8	Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2004

label rho theta 2000 0.093 233.5 2001 0.107 250.4 2002 0.106 265.5 2003 0.099 282.0 2004 0.092 301.2 2005 0.090 322.3 2006 0.095 342.6 2007 0.105 360.0 2008 0.118 14.0 2009 0.129 25.4 2010 0.136 35.2 2011 0.137 44.5 2012 0.127 54.3 2013 0.102 67.3 2014 0.063 93.7 2015 0.044 174.6 2016 0.081 224.2 2017 0.103 244.0 2018 0.107 259.3 2019 0.102 275.0 2020 0.094 293.0 2021 0.090 313.5 2022 0.092 334.6 2023 0.101 353.3 2024 0.112 8.6 2025 0.124 21.0 2026 0.134 31.3 2027 0.137 40.7 2028 0.132 50.1 2029 0.114 61.3 2030 0.080 79.6 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
01017+2518	HDS 134		2005	19	340	0.1	7.48	7.76	G8IV	OD	010143.49+251732.1
01017+2518	HDS 134		2007	21	192	0.1	7.48	7.76	G8IV G8IV	OD	010143.49+251732.1
01017+2518	HDS 134		2010	28	215	0.1	7.48	7.76	G8IV G8IV	OD	010143.49+251732.1

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