09278-0604 B  2530

 
 
09h 27m 46.78s -06 04' 16.4" P.A. 103.1 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
2017
Obs
73
Pa first
319
Pa last
35
P.A. Now (θ)
103.1°
Sep first
0.2
Sep last
0.0
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
 
 
Precise pa
34.6
Precise sep
0.044
Cdsa2 id
B 2530
Constellation
Hydra
SAO
136872
HIP
46404
Tycho2
4893-01379-1
HD
81809
HR
3750
GL
Gl 344A
BD
BD-05 2802
Ra deg
9.462994444444444
De deg
-6.071222222222222
Distance
30.41
Distance ly
99.2
last precise pa
34.6
last precise sep
0.044
 
 
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





wds09278-0604c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
09278-0604 B 2530 1999 64 153 0.4 5.63 7.52 G2V NOD 092746.78-060416.4
09278-0604 B 2530 2009 65 327 0.3 5.63 7.52 G2V NOD 092746.78-060416.4
09278-0604 B 2530 2011 67 330 0.3 5.63 7.52 G2V NOD 092746.78-060416.4
09278-0604 B 2530 2013 68 334 0.3 5.63 7.52 G2V NOD 092746.78-060416.4
09278-0604 B 2530 2014 70 336 0.2 5.63 7.52 G2V NO 092746.78-060416.4
09278-0604 B 2530 2017 73 35 0.0 5.63 7.52 G2V NO 092746.78-060416.4

If you need more information about this double, apply for a data request form to the WDS.