23125-2349 HDS 3306 (HD 218957)
23h 12m 30.01s -23° 49' 10.1" P.A. 79.00 sep 0.2 mag 8.45,9.32 Sp F3V dist. 155.76 pc (508.09 l.y.)
| Coord 2000 |
23125-2349 |
|
Discov num |
HDS3306 |
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Comp |
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Coord arcsec 2000 |
23 12 30.01 -23 49 10.1 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
11 |
|
| Pa first |
70 |
|
Pa last |
79 |
|
P.A. Now (θ) |
79° |
|
| Sep first |
0.2 |
|
Sep last |
0.156 |
|
Sep. Now (ρ) |
0.156" |
|
| Mag pri |
8.45 |
|
Mag sec |
9.32 |
|
delta mag (ΔM) |
0.87 |
|
Spectral class |
F3V (yellow-white) |
|
| Pri motion ra |
+059 |
|
Sec motion ra |
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| Pri motion dec |
-017 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 218957 |
|
Constellation |
Aquarius |
|
SAO |
191719 |
|
HIP |
114568 |
|
| Tycho2 |
6972-00785-1 |
|
Gaia DR2 |
2384940162024332032 |
|
HD |
218957 |
|
CD |
CD-2417535 |
|
| CP |
CP-24 7434 |
|
Distance |
155.76 |
|
Distance ly |
508.09 |
|
ORBITAL ELEMENTS
| Period (P) | 35.6y | |
Periastron (T) | 2011.19y | |
Semi-major axis (a) | 0.107a | |
| Eccentricity (e) | 0.8 | |
Inclination (i) | 135.7° | |
Longitude of periastron (ω) | 219.2° | |
| Node (Ω) | 96.5° | |
Notes | | |
Reference | Tok2017c | |
| Equinox | 2000 | |
Last observation | 2016 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
53.6 |
0.145 |
| 2001 |
51.1 |
0.138 |
| 2002 |
48.3 |
0.130 |
| 2003 |
45.1 |
0.121 |
| 2004 |
41.4 |
0.111 |
| 2005 |
37.0 |
0.101 |
| 2006 |
31.5 |
0.089 |
| 2007 |
24.1 |
0.076 |
| 2008 |
13.8 |
0.063 |
| 2009 |
357.7 |
0.049 |
| 2010 |
329.1 |
0.036 |
| 2011 |
268.3 |
0.022 |
| 2012 |
144.0 |
0.029 |
| 2013 |
114.5 |
0.057 |
| 2014 |
103.8 |
0.080 |
| 2015 |
97.5 |
0.098 |
| 2016 |
93.0 |
0.113 |
| 2017 |
89.5 |
0.126 |
| 2018 |
86.7 |
0.136 |
| 2019 |
84.2 |
0.145 |
| 2020 |
81.9 |
0.153 |
| 2021 |
79.9 |
0.159 |
| 2022 |
78.0 |
0.164 |
| 2023 |
76.2 |
0.168 |
| 2024 |
74.5 |
0.171 |
| 2025 |
72.8 |
0.173 |
| 2026 |
71.1 |
0.174 |
| 2027 |
69.5 |
0.175 |
| 2028 |
67.9 |
0.174 |
| 2029 |
66.2 |
0.173 |
| 2030 |
64.5 |
0.171 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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