11191-3100 I   506

 
 
11H 19M 04.62S -31 00' 22.3" P.A. 178.3 SEP 0.81 MAG 8.24,9.37 SP G2/3V DIST. 93.63 PC (305.42 L.Y.)
 
 
Coord 2000
11191-3100
Discov num
I   506
Comp
Coord arcsec 2000
11 19 04.62 -31 00 22.3
Date first
1909
Date last
2011
Obs
26
Pa first
100
Pa last
168
P.A. Now (θ)
178.3°
Sep first
1.0
Sep last
0.8
Sep. Now (ρ)
0.81"
Mag pri
8.24
Mag sec
9.37
delta mag (ΔM)
1.13
Spectral class
G2/3V (yellow)
Pri motion ra
-077
Sec motion ra
-077
Pri motion dec
+071
Sec motion dec
+071
Notes
O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
SAO
202316
HIP
55258
Tycho2
7202-00516-1
HD
98415
CD
CD-30 9107
CP
CP-30 3311
Distance
93.63
Distance ly
305.42
last precise pa
168.2
last precise sep
0.795
 
 
ORBITAL ELEMENTS
 
 
Period (P)585y Periastron (T)2460y Semi-major axis (a)1.94a
Eccentricity (e)0.634 Inclination (i)71.3° Longitude of periastron (ω)301.3°
Node (Ω)87.6° Note Grade5(1=Definitive, 9=Indet.)
Equinox2000 Last observation1991
label rho theta
2000 0.786 162.9
2001 0.786 163.8
2002 0.787 164.7
2003 0.787 165.6
2004 0.788 166.6
2005 0.789 167.5
2006 0.790 168.4
2007 0.792 169.3
2008 0.793 170.2
2009 0.795 171.2
2010 0.797 172.1
2011 0.799 173.0
2012 0.801 173.9
2013 0.803 174.8
2014 0.806 175.6
2015 0.808 176.5
2016 0.811 177.4
2017 0.814 178.3
2018 0.817 179.1
2019 0.820 180.0
2020 0.823 180.8
2021 0.827 181.7
2022 0.830 182.5
2023 0.834 183.4
2024 0.838 184.2
2025 0.842 185.0
2026 0.846 185.8
2027 0.850 186.6
2028 0.855 187.4
2029 0.859 188.2
2030 0.864 188.9

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