08454-0013 A 2548
08h 45m 24.62s -00° 13' 03.6" P.A. 246.00 sep 0.1 mag 9.10,9.30 Sp F
| Coord 2000 |
08454-0013 |
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Discov num |
A 2548 |
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Comp |
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Coord arcsec 2000 |
08 45 24.62 -00 13 03.6 |
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| Date first |
1913 |
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Date last |
2019 |
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Obs |
9 |
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| Pa first |
8 |
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Pa last |
246 |
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P.A. Now (θ) |
246° |
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| Sep first |
0.3 |
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Sep last |
0.11 |
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Sep. Now (ρ) |
0.11" |
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| Mag pri |
9.10 |
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Mag sec |
9.30 |
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delta mag (ΔM) |
0.2 |
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Spectral class |
F (yellow-white) |
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| Pri motion ra |
-006 |
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Sec motion ra |
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| Pri motion dec |
+008 |
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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
| Constellation |
Hydra |
|
ADS |
6976 |
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ORBITAL ELEMENTS
| Period (P) | 1100y | |
Periastron (T) | 1982.7y | |
Semi-major axis (a) | 0.4974a | |
| Eccentricity (e) | 0.575 | |
Inclination (i) | 114.9° | |
Longitude of periastron (ω) | 230.1° | |
| Node (Ω) | 179.2° | |
Notes | | |
Reference | Tok2019c | |
| Equinox | | |
Last observation | 2018 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
301.4 |
0.105 |
| 2001 |
298.8 |
0.104 |
| 2002 |
296.2 |
0.102 |
| 2003 |
293.5 |
0.101 |
| 2004 |
290.7 |
0.099 |
| 2005 |
287.8 |
0.098 |
| 2006 |
284.9 |
0.098 |
| 2007 |
282.0 |
0.097 |
| 2008 |
279.0 |
0.097 |
| 2009 |
276.0 |
0.097 |
| 2010 |
273.0 |
0.097 |
| 2011 |
270.1 |
0.097 |
| 2012 |
267.1 |
0.098 |
| 2013 |
264.2 |
0.099 |
| 2014 |
261.4 |
0.100 |
| 2015 |
258.6 |
0.101 |
| 2016 |
255.9 |
0.102 |
| 2017 |
253.3 |
0.104 |
| 2018 |
250.7 |
0.106 |
| 2019 |
248.3 |
0.108 |
| 2020 |
245.9 |
0.110 |
| 2021 |
243.6 |
0.112 |
| 2022 |
241.5 |
0.114 |
| 2023 |
239.4 |
0.117 |
| 2024 |
237.4 |
0.120 |
| 2025 |
235.5 |
0.122 |
| 2026 |
233.7 |
0.125 |
| 2027 |
231.9 |
0.128 |
| 2028 |
230.3 |
0.131 |
| 2029 |
228.7 |
0.134 |
| 2030 |
227.2 |
0.138 |
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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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