12520-2648 B 234
12h 51m 55.76s -26° 47' 23.2" P.A. 296.00 sep 0.6 mag 10.29,10.26
| Coord 2000 |
12520-2648 |
|
Discov num |
B 234 |
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Comp |
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Coord arcsec 2000 |
12 51 55.76 -26 47 23.2 |
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| Date first |
1926 |
|
Date last |
2017 |
|
Obs |
14 |
|
| Pa first |
306 |
|
Pa last |
296 |
|
P.A. Now (θ) |
296° |
|
| Sep first |
0.6 |
|
Sep last |
0.604 |
|
Sep. Now (ρ) |
0.604" |
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| Mag pri |
10.29 |
|
Mag sec |
10.26 |
|
delta mag (ΔM) |
0.03 |
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Spectral class |
|
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| Pri motion ra |
-104 |
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Sec motion ra |
-104 |
|
| Pri motion dec |
+032 |
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Sec motion dec |
+032 |
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| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hydra |
|
Tycho2 |
6705-00547-1 |
|
ADS |
8689 |
|
ORBITAL ELEMENTS
| Period (P) | 122y | |
Periastron (T) | 1972y | |
Semi-major axis (a) | 0.357a | |
| Eccentricity (e) | 0.88 | |
Inclination (i) | 43° | |
Longitude of periastron (ω) | 335° | |
| Node (Ω) | 139.7° | |
Notes | | |
Reference | Hei1986a | |
| Equinox | | |
Last observation | 1984 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
288.0 |
0.479 |
| 2001 |
288.5 |
0.489 |
| 2002 |
289.1 |
0.498 |
| 2003 |
289.6 |
0.507 |
| 2004 |
290.1 |
0.515 |
| 2005 |
290.6 |
0.523 |
| 2006 |
291.0 |
0.531 |
| 2007 |
291.5 |
0.538 |
| 2008 |
291.9 |
0.546 |
| 2009 |
292.4 |
0.552 |
| 2010 |
292.8 |
0.559 |
| 2011 |
293.2 |
0.566 |
| 2012 |
293.6 |
0.572 |
| 2013 |
294.0 |
0.578 |
| 2014 |
294.4 |
0.583 |
| 2015 |
294.8 |
0.588 |
| 2016 |
295.2 |
0.594 |
| 2017 |
295.5 |
0.598 |
| 2018 |
295.9 |
0.603 |
| 2019 |
296.2 |
0.607 |
| 2020 |
296.6 |
0.611 |
| 2021 |
296.9 |
0.615 |
| 2022 |
297.3 |
0.619 |
| 2023 |
297.6 |
0.622 |
| 2024 |
298.0 |
0.625 |
| 2025 |
298.3 |
0.628 |
| 2026 |
298.6 |
0.631 |
| 2027 |
298.9 |
0.633 |
| 2028 |
299.3 |
0.635 |
| 2029 |
299.6 |
0.637 |
| 2030 |
299.9 |
0.639 |
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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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