09320-0111 CHR 174 (Tau2 Hya)

 
 
09h 31m 58.93s -01 11' 04.8" P.A. 357.00 sep 0.0 mag 5.10,5.70 Sp A3V dist. 158.73 pc (517.78 l.y.)
 
 
Coord 2000 09320-0111 Discov num CHR 174 Comp Coord arcsec 2000 09 31 58.93 -01 11 04.8
Date first 1988 Date last 2021 Obs 18
Pa first 209 Pa last 357.3 P.A. Now (θ) 246.8°
Sep first 0.0 Sep last 0.02 Sep. Now (ρ) 0.042"
Mag pri 5.10 Mag sec 5.70 delta mag (ΔM) 0.6 Spectral class A3V (white)
Pri motion ra -016 Sec motion ra
Pri motion dec -008 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Tau2 Hya Constellation Hydra SAO 136932 HIP 46776
Tycho2 4894-02528-1 Gaia DR2 3839656786454467072 HD 82446 HR 3787
GC 13153 BD BD-00 2211 Bayer Tau 2 Hydrae Bayer name Tau2 Hya
Flamsteed 32 Hydrae Flamsteed name 32 Hya Distance 158.73 Distance ly 517.78
Bayer greek τ2 Hya
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.021y± 0.03 Periastron (T)2015.055y± 0.026 Semi-major axis (a)0.032a± 0.001
Eccentricity (e)0.466± 0.012 Inclination (i)170.2°± 11.7 Longitude of periastron (ω)123.7°± 71.5
Node (Ω)162°± 71.8 Notesn ReferenceTok2021f
Equinox Last observation2021 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 218.0 0.046
2001 192.0 0.043
2002 153.7 0.031
2003 40.3 0.017
2004 284.8 0.031
2005 244.9 0.042
2006 218.5 0.046
2007 192.6 0.043
2008 154.9 0.032
2009 44.3 0.017
2010 286.1 0.030
2011 245.6 0.042
2012 219.0 0.046
2013 193.2 0.043
2014 156.0 0.032
2015 48.2 0.017
2016 287.3 0.030
2017 246.2 0.042
2018 219.5 0.046
2019 193.8 0.043
2020 157.1 0.032
2021 52.0 0.017
2022 288.6 0.030
2023 246.8 0.042
2024 220.1 0.046
2025 194.4 0.044
2026 158.1 0.033
2027 55.9 0.017
2028 289.9 0.029
2029 247.5 0.042
2030 220.6 0.046


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



 
 


wds09320-0111b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic