09252-1258 WSI  73

 
 
09H 25M 05.39S -12 58' 00.5" P.A. 109.7 SEP 0.08 MAG 10.10,11.10 SP K1/2V DIST. 43.4 PC (141.57 L.Y.)
 
 
Coord 2000
09252-1258
Discov num
WSI  73
Comp
Coord arcsec 2000
09 25 05.39 -12 58 00.5
Date first
2001
Date last
2015
Obs
11
Pa first
285
Pa last
104
P.A. Now (θ)
109.7°
Sep first
0.1
Sep last
0.0
Sep. Now (ρ)
0.08"
Mag pri
10.10
Mag sec
11.10
delta mag (ΔM)
1
Spectral class
K1/2V (yellow-orange)
Pri motion ra
+556
Sec motion ra
Pri motion dec
-569
Sec motion dec
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
HIP
46191
Tycho2
5467-01584-1
HD
81408
BD
BD-12 2889
Distance
43.4
Distance ly
141.57
last precise pa
103.6
last precise sep
0.044
 
 
ORBITAL ELEMENTS
 
 
Period (P)27.3y Periastron (T)2014.8y Semi-major axis (a)0.235a
Eccentricity (e)0.86 Inclination (i)86° Longitude of periastron (ω)283.4°
Node (Ω)101.1° Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.089 261.6
2001 0.103 264.4
2002 0.117 266.6
2003 0.130 268.3
2004 0.141 269.7
2005 0.152 270.9
2006 0.161 271.9
2007 0.168 272.9
2008 0.174 273.8
2009 0.176 274.6
2010 0.176 275.5
2011 0.171 276.3
2012 0.160 277.3
2013 0.138 278.4
2014 0.093 280.3
2015 0.040 99.7
2016 0.081 105.9
2017 0.080 109.7
2018 0.070 114.3
2019 0.057 120.7
2020 0.044 131.0
2021 0.032 149.6
2022 0.026 182.3
2023 0.030 217.2
2024 0.042 238.3
2025 0.055 249.6
2026 0.070 256.2
2027 0.085 260.6
2028 0.099 263.7
2029 0.113 266.0
2030 0.126 267.8

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