09320-0111 CHR 174 (Tau2 Hya)

 
 
09H 31M 58.93S -01 11' 04.8" P.A. 245.2 SEP 0.04 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
2015
Obs
5
Pa first
209
Pa last
112
P.A. Now (θ)
245.2°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0.04"
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
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
last precise pa
111.9
last precise sep
0.029
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.09y± 0.14 Periastron (T)2015.06y± 0.04 Semi-major axis (a)0.0342a± 0.0022
Eccentricity (e)0.471± 0.019 Inclination (i)159.4°± 12.1 Longitude of periastron (ω)351.1°± 30.6
Node (Ω)29.6°± 32.5 Note Grade3(1=Definitive, 9=Indet.)
Equinox2000 Last observation
label rho theta
2000 0.050 214.2
2001 0.044 189.4
2002 0.029 147.4
2003 0.018 17.3
2004 0.033 276.3
2005 0.046 240.2
2006 0.050 216.2
2007 0.045 192.0
2008 0.031 153.1
2009 0.018 32.7
2010 0.032 281.2
2011 0.045 242.6
2012 0.050 218.3
2013 0.046 194.4
2014 0.033 158.1
2015 0.018 48.4
2016 0.030 286.6
2017 0.044 245.2
2018 0.050 220.3
2019 0.047 196.8
2020 0.034 162.7
2021 0.018 64.0
2022 0.029 292.6
2023 0.043 247.9
2024 0.050 222.4
2025 0.048 199.1
2026 0.036 166.9
2027 0.019 78.8
2028 0.027 299.3
2029 0.042 250.7
2030 0.050 224.4

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

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic