09278-0604 B  2530

 
 
09H 27M 46.78S -06 04' 16.4" P.A. 10 SEP 0.05 MAG 5.63,7.52 SP G2V DIST. 30.41 PC (99.2 L.Y.)
 
 
Coord 2000
09278-0604
Discov num
B  2530
Comp
Coord arcsec 2000
09 27 46.78 -06 04 16.4
Date first
1938
Date last
2014
Obs
70
Pa first
319
Pa last
336
P.A. Now (θ)
10°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.05"
Mag pri
5.63
Mag sec
7.52
delta mag (ΔM)
1.89
Spectral class
G2V (yellow)
Pri motion ra
-227
Sec motion ra
-227
Pri motion dec
-077
Sec motion dec
-077
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Hydra
SAO
136872
HIP
46404
Tycho2
4893-01379-1
HD
81809
HR
3750
GL
Gl 344A
BD
BD-05 2802
Distance
30.41
Distance ly
99.2
last precise pa
336
last precise sep
0.23
 
 
ORBITAL ELEMENTS
 
 
Period (P)34.8y± 0.06 Periastron (T)2010.11y± 0.1 Semi-major axis (a)0.428a± 0.001
Eccentricity (e)0.27± 0.003 Inclination (i)85.4°± 0.1 Longitude of periastron (ω)341.9°± 1.1
Node (Ω)330.8°± 0.1 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.415 153.5
2001 0.363 154.5
2002 0.302 155.8
2003 0.233 157.9
2004 0.156 161.9
2005 0.076 174.3
2006 0.034 271.2
2007 0.106 316.4
2008 0.183 323.9
2009 0.248 327.1
2010 0.293 329.1
2011 0.315 330.7
2012 0.312 332.1
2013 0.285 333.8
2014 0.240 335.9
2015 0.183 339.2
2016 0.117 346.0
2017 0.053 10.0
2018 0.048 103.1
2019 0.111 131.8
2020 0.178 139.2
2021 0.243 142.6
2022 0.303 144.6
2023 0.357 145.9
2024 0.405 146.9
2025 0.447 147.7
2026 0.480 148.4
2027 0.507 149.0
2028 0.525 149.6
2029 0.535 150.1
2030 0.536 150.6

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