13310-3924 SEE 179 (d Cen)

 
 
13h 31m 02.67s -39 24' 26.2" P.A. 45.4 sep 0.17 mag 4.64,5.03 Sp G9Ib dist. 277.78 pc (906.12 l.y.)
 
 
Coord 2000
13310-3924
Discov num
SEE 179
Comp
Coord arcsec 2000
13 31 02.67 -39 24 26.2
Date first
1897
Date last
2014
Obs
68
Pa first
103
Pa last
53
P.A. Now (θ)
45.4°
Sep first
0.2
Sep last
0.2
Sep. Now (ρ)
0.17"
Mag pri
4.64
Mag sec
5.03
delta mag (ΔM)
0.39
Spectral class
G9Ib (yellow)
Pri motion ra
-007
Sec motion ra
Pri motion dec
-010
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
53.2
Precise sep
0.175
Other name
d Cen
Constellation
Centaurus
SAO
204545
HIP
65936
Tycho2
7792-02393-1
HD
117440
HR
5089
GC
18254
CD
CD-38 8592
CP
CP-38 5526
Distance
277.78
Distance ly
906.12
last precise pa
53.2
last precise sep
0.175
 
 
ORBITAL ELEMENTS
 
 
Period (P)83.14y± 1.26 Periastron (T)1956.12y± 1.91 Semi-major axis (a)0.161a± 0.004
Eccentricity (e)0.521± 0.013 Inclination (i)145.2°± 4 Longitude of periastron (ω)244.4°± 3.6
Node (Ω)146.5°± 8.6 Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2014
label rho theta
2000 0.207 82.6
2001 0.206 80.7
2002 0.204 78.9
2003 0.203 77.0
2004 0.201 75.0
2005 0.199 73.1
2006 0.197 71.1
2007 0.195 69.0
2008 0.193 66.9
2009 0.191 64.8
2010 0.188 62.6
2011 0.186 60.4
2012 0.183 58.1
2013 0.181 55.7
2014 0.178 53.3
2015 0.175 50.7
2016 0.172 48.1
2017 0.169 45.4
2018 0.166 42.7
2019 0.163 39.8
2020 0.160 36.8
2021 0.157 33.6
2022 0.153 30.4
2023 0.150 26.9
2024 0.146 23.4
2025 0.143 19.6
2026 0.139 15.6
2027 0.135 11.4
2028 0.131 7.0
2029 0.126 2.2
2030 0.122 357.1

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds13310-3924b.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
13310-3924 SEE 179 2006 66 70 0.2 4.64 5.03 G9Ib NO 133102.67-392426.2
13310-3924 SEE 179 2009 67 64 0.2 4.64 5.03 G9Ib NO 133102.67-392426.2
13310-3924 SEE 179 2013 67 56 0.2 4.64 5.03 G9Ib NO 133102.67-392426.2
13310-3924 SEE 179 2014 68 53 0.2 4.64 5.03 G9Ib NO 133102.67-392426.2

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