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)	295.9°
Sep first	0.1		Sep last	0.1		Sep. Now (ρ)	0.09"
Mag pri	7.49		Mag sec	7.62		delta mag (ΔM)	0.13		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)

Visually invisible, K-band or other infrared star This double is physical.

Precise pa	214.8		Precise sep	0.138		Constellation	Pisces		SAO	74439
HIP	4809		Tycho2	1743-01174-1		Gaia DR2	60685427840		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)	16.28y	± 0.08	Periastron (T)	1998.55y	± 0.06	Semi-major axis (a)	0.13a	± 0.002
Eccentricity (e)	0.385	± 0.014	Inclination (i)	58.18°	± 0.93	Longitude of periastron (ω)	287.45°	± 0.6
Node (Ω)	235.03°	± 0.68	Note			Grade	2	(1=Definitive, 9=Indet.)
Equinox			Last observation	2010

label rho theta 2000 0.097 232.8 2001 0.109 249.5 2002 0.107 264.9 2003 0.099 281.9 2004 0.093 301.8 2005 0.092 323.3 2006 0.098 343.7 2007 0.109 0.7 2008 0.122 14.4 2009 0.133 25.6 2010 0.139 35.3 2011 0.138 44.7 2012 0.125 55.0 2013 0.097 69.6 2014 0.055 103.4 2015 0.052 188.6 2016 0.089 226.9 2017 0.107 245.1 2018 0.108 260.5 2019 0.102 276.9 2020 0.094 295.9 2021 0.092 317.3 2022 0.096 338.2 2023 0.106 356.3 2024 0.118 10.9 2025 0.130 22.6 2026 0.138 32.7 2027 0.139 42.0 2028 0.130 51.9 2029 0.107 64.7 2030 0.067 89.6 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

If you need more information about this double, apply for a data request form to the WDS.