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 |
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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 |
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Date last |
2017 |
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Obs |
14 |
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Pa first |
306 |
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Pa last |
296 |
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P.A. Now (θ) |
296° |
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Sep first |
0.6 |
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Sep last |
0.604 |
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Sep. Now (ρ) |
0.604" |
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Mag pri |
10.29 |
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Mag sec |
10.26 |
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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 |
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Pri motion dec |
+032 |
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Sec motion dec |
+032 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Hydra |
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Tycho2 |
6705-00547-1 |
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ADS |
8689 |
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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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