01312-0702 HDS 198

 
 
01h 31m 10.70s -07 01' 58.0" P.A. 146.2 sep 0.08 mag 8.19,9.79 Sp K0 dist. 105.26 pc (343.36 l.y.)
 
 
Coord 2000
01312-0702
Discov num
HDS 198
Comp
Coord arcsec 2000
01 31 10.70 -07 01 58.0
Date first
1991
Date last
2018
Obs
9
Pa first
190
Pa last
150
P.A. Now (θ)
146.2°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.08"
Mag pri
8.19
Mag sec
9.79
delta mag (ΔM)
1.6
Spectral class
K0 (yellow-orange)
Pri motion ra
-001
Sec motion ra
Pri motion dec
-015
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
150.2
Precise sep
0.084
Constellation
Cetus
HIP
7075
Tycho2
4687-00409-1
Gaia DR2
38342739968
HD
9278
BD
BD-07 246
Distance
105.26
Distance ly
343.36
last precise pa
150.2
last precise sep
0.084
 
 
ORBITAL ELEMENTS
 
 
Period (P)51.6y Periastron (T)2028.8y Semi-major axis (a)0.176a
Eccentricity (e)0.7 Inclination (i)107.3° Longitude of periastron (ω)42.4°
Node (Ω)18.5° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2018
label rho theta
2000 0.242 185.8
2001 0.238 185.0
2002 0.234 184.2
2003 0.229 183.3
2004 0.223 182.4
2005 0.217 181.5
2006 0.210 180.5
2007 0.203 179.4
2008 0.195 178.2
2009 0.186 177.0
2010 0.177 175.6
2011 0.167 174.0
2012 0.157 172.3
2013 0.147 170.3
2014 0.136 168.0
2015 0.124 165.3
2016 0.113 162.0
2017 0.101 157.9
2018 0.089 152.8
2019 0.077 146.2
2020 0.067 137.3
2021 0.057 125.2
2022 0.051 109.2
2023 0.048 90.2
2024 0.050 70.9
2025 0.055 54.3
2026 0.062 40.9
2027 0.065 29.7
2028 0.059 18.1
2029 0.034 356.7
2030 0.022 258.5

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
 
grafico orbita






wds01312-0702a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
01312-0702 HDS 198 2004 2 182 0.2 8.19 9.79 K0 D 013110.70-070158.0
01312-0702 HDS 198 2007 3 179 0.2 8.19 9.79 K0 D 013110.70-070158.0
01312-0702 HDS 198 2010 4 176 0.2 8.19 9.79 K0 D 013110.70-070158.0
01312-0702 HDS 198 2015 6 162 0.1 8.19 9.79 K0 013110.70-070158.0
01312-0702 HDS 198 2017 8 153 0.1 8.19 9.79 K0 013110.70-070158.0

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