09228-0950 A  1342AB (KU Hya)

 
 
09H 22M 50.87S -09 50' 19.5" P.A. 216 SEP 0.14 MAG 6.99,7.84 SP A3V DIST. 144.51 PC (471.39 L.Y.)
 
 
Coord 2000
09228-0950
Discov num
A  1342
Comp
AB
Coord arcsec 2000
09 22 50.87 -09 50 19.5
Date first
1905
Date last
2014
Obs
76
Pa first
198
Pa last
207
P.A. Now (θ)
216°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.14"
Mag pri
6.99
Mag sec
7.84
delta mag (ΔM)
0.85
Spectral class
A3V (white)
Pri motion ra
-023
Sec motion ra
Pri motion dec
-016
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
09228-0950 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show KU Hya 136799 09228-0950 A 1342 AB 1905 2014 76 216 0.1 6.99 7.84 0.85 Y <===
Show 136799 09228-0950 RST5568 AB,C 1938 2009 14 210 1.9 6.53 11.60 5.07
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
KU Hya
Constellation
Hydra
SAO
136799
HIP
45999
Tycho2
5463-01516-1
HD
81009
HR
3724
ADS
7334
BD
BD-09 2816
Distance
144.51
Distance ly
471.39
last precise pa
206.7
last precise sep
0.164
 
 
ORBITAL ELEMENTS
 
 
Period (P)52.98y± 0.37 Periastron (T)2020.2y± 0.45 Semi-major axis (a)0.169a± 0.001
Eccentricity (e)0.074± 0.008 Inclination (i)68.5°± 0.6 Longitude of periastron (ω)58.7°± 3.3
Node (Ω)22.4°± 0.4 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.068 308.6
2001 0.074 322.9
2002 0.083 334.5
2003 0.093 343.7
2004 0.105 350.9
2005 0.116 356.8
2006 0.127 1.6
2007 0.137 5.6
2008 0.146 9.2
2009 0.153 12.4
2010 0.158 15.3
2011 0.161 18.1
2012 0.162 20.8
2013 0.161 23.5
2014 0.158 26.3
2015 0.152 29.2
2016 0.145 32.4
2017 0.135 36.0
2018 0.124 40.3
2019 0.111 45.4
2020 0.098 52.0
2021 0.084 60.6
2022 0.072 72.4
2023 0.062 88.4
2024 0.058 108.4
2025 0.060 129.1
2026 0.069 146.4
2027 0.080 159.4
2028 0.094 168.8
2029 0.108 175.8
2030 0.121 181.2

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