13377-2337 RST 2856 AB
13h 37m 43.02s -23° 36' 31.7" P.A. 286.00 sep 0.4 mag 10.30,10.30 Sp G5
| Coord 2000 |
13377-2337 |
|
Discov num |
RST2856 |
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Comp |
AB |
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Coord arcsec 2000 |
13 37 43.02 -23 36 31.7 |
|
| Date first |
1935 |
|
Date last |
2016 |
|
Obs |
9 |
|
| Pa first |
116 |
|
Pa last |
285.7 |
|
P.A. Now (θ) |
288.5° |
|
| Sep first |
0.2 |
|
Sep last |
0.356 |
|
Sep. Now (ρ) |
0.307" |
|
| Mag pri |
10.30 |
|
Mag sec |
10.30 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
-137 |
|
Sec motion ra |
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| Pri motion dec |
-010 |
|
Sec motion dec |
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| Notes |
N
O
W
(See Notes, Orbital solution, ) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Hydra |
|
Tycho2 |
6714-00795-1 |
|
SUSPECTED ORBITAL ELEMENTS
| Identifier | 13377-2337 RST2856 |
| coord_arcsec_2000 | 133743.02-233631.7 |
| Period (P) | 122y | |
Periastron (T) | 2038.6y | |
Semi-major axis (a) | 0.352a | |
| Eccentricity (e) | 0.55 | |
Inclination (i) | 81.9° | |
Longitude of periastron (ω) | 290.2° | |
| Node (Ω) | 108.7° | |
Notes | n | |
Reference | Tok2016e | |
| Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
280.6 |
0.350 |
| 2001 |
281.0 |
0.353 |
| 2002 |
281.3 |
0.357 |
| 2003 |
281.7 |
0.360 |
| 2004 |
282.0 |
0.363 |
| 2005 |
282.3 |
0.365 |
| 2006 |
282.6 |
0.367 |
| 2007 |
283.0 |
0.368 |
| 2008 |
283.3 |
0.369 |
| 2009 |
283.6 |
0.370 |
| 2010 |
283.9 |
0.370 |
| 2011 |
284.2 |
0.369 |
| 2012 |
284.5 |
0.368 |
| 2013 |
284.9 |
0.366 |
| 2014 |
285.2 |
0.364 |
| 2015 |
285.5 |
0.361 |
| 2016 |
285.8 |
0.357 |
| 2017 |
286.2 |
0.353 |
| 2018 |
286.5 |
0.348 |
| 2019 |
286.9 |
0.342 |
| 2020 |
287.3 |
0.335 |
| 2021 |
287.7 |
0.327 |
| 2022 |
288.1 |
0.318 |
| 2023 |
288.5 |
0.307 |
| 2024 |
289.0 |
0.296 |
| 2025 |
289.5 |
0.283 |
| 2026 |
290.1 |
0.269 |
| 2027 |
290.7 |
0.254 |
| 2028 |
291.4 |
0.237 |
| 2029 |
292.2 |
0.218 |
| 2030 |
293.2 |
0.197 |
|
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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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