00310-3138 HDS  69

 
 
00h 31m 01.17s -31 38' 19.3" P.A. 97.10 sep 0.1 mag 10.45,10.45 Sp F8/G0V dist. 124.22 pc (405.21 l.y.)
 
 
Coord 2000
00310-3138
Discov num
HDS  69
Comp
Coord arcsec 2000
00 31 01.17 -31 38 19.3
Date first
1991
Date last
2020
Obs
7
Pa first
106
Pa last
96
P.A. Now (θ)
97.1°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.13"
Mag pri
10.45
Mag sec
10.45
delta mag (ΔM)
0
Spectral class
F8/G0V (yellow-white)
Pri motion ra
+034
Sec motion ra
Pri motion dec
-189
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
96.2
Precise sep
0.127
Constellation
Hydra
SAO
192582
HIP
2433
Tycho2
6991-00695-1
Gaia DR2
2317410803546673792
HD
2762
CD
CD-32 163
CP
CP-32 52
Distance
124.22
Distance ly
405.21
last precise pa
96.2
last precise sep
0.127
 
 
ORBITAL ELEMENTS
 
 
Period (P)61.2y Periastron (T)2010.9y Semi-major axis (a)0.135a
Eccentricity (e)0.65 Inclination (i)84° Longitude of periastron (ω)198.2°
Node (Ω)100.1° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2021
label rho theta
2000 0.077 110.4
2001 0.065 112.1
2002 0.052 114.6
2003 0.039 118.8
2004 0.026 127.2
2005 0.014 151.6
2006 0.011 221.2
2007 0.022 257.8
2008 0.034 269.3
2009 0.044 274.8
2010 0.049 278.7
2011 0.044 282.5
2012 0.029 288.9
2013 0.010 318.0
2014 0.016 71.8
2015 0.036 87.2
2016 0.055 91.5
2017 0.073 93.6
2018 0.089 94.9
2019 0.104 95.9
2020 0.117 96.6
2021 0.130 97.1
2022 0.141 97.6
2023 0.151 98.0
2024 0.161 98.3
2025 0.169 98.6
2026 0.177 98.9
2027 0.183 99.2
2028 0.190 99.4
2029 0.195 99.7
2030 0.200 99.9


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



 
 


wds00310-3138a.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
00310-3138 HDS 69 1991 1 106 0.2 10.45 10.45 F8/G0V 003101.17-313819.3
00310-3138 HDS 69 2015 2 91 0.1 10.45 10.45 F8/G0V 003101.17-313819.3
00310-3138 HDS 69 2017 4 95 0.1 10.45 10.45 F8/G0V 003101.17-313819.3
00310-3138 HDS 69 2018 5 96 0.1 10.45 10.45 F8/G0V 003101.17-313819.3
00310-3138 HDS 69 2019 6 96 0.1 10.45 10.45 F8/G0V 003101.17-313819.3

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