12283-1548 MEL 7
12h 28m 15.23s -15° 47' 34.2" P.A. 279.00 sep 0.3 mag 20.52,21.05
Coord 2000 |
12283-1548 |
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Discov num |
MEL 7 |
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Comp |
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Coord arcsec 2000 |
12 28 15.23 -15 47 34.2 |
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Date first |
1998 |
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Date last |
2013 |
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Obs |
20 |
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Pa first |
45 |
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Pa last |
279.4 |
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P.A. Now (θ) |
279.4° |
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Sep first |
0.3 |
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Sep last |
0.274 |
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Sep. Now (ρ) |
0.274" |
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Mag pri |
20.52 |
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Mag sec |
21.05 |
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delta mag (ΔM) |
0.53 |
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Spectral class |
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Pri motion ra |
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Sec motion ra |
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Pri motion dec |
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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
ORBITAL ELEMENTS
Period (P) | 47y | ± 7 |
Periastron (T) | 83000d (2086.122y) | ± 8000 |
Semi-major axis (a) | 297m | ± 11 |
Eccentricity (e) | 0.075 | ± 0.035 |
Inclination (i) | 140° | ± 4 |
Longitude of periastron (ω) | -30° | ± 50 |
Node (Ω) | 60.4° | ± 2.5 |
Notes | | |
Reference | Dup2017 | |
Equinox | | |
Last observation | 2013 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
29.4 |
0.264 |
2001 |
21.8 |
0.257 |
2002 |
13.7 |
0.250 |
2003 |
5.3 |
0.244 |
2004 |
356.4 |
0.239 |
2005 |
347.2 |
0.235 |
2006 |
337.8 |
0.234 |
2007 |
328.4 |
0.236 |
2008 |
319.3 |
0.239 |
2009 |
310.4 |
0.245 |
2010 |
302.1 |
0.253 |
2011 |
294.3 |
0.261 |
2012 |
287.0 |
0.271 |
2013 |
280.2 |
0.280 |
2014 |
273.8 |
0.289 |
2015 |
267.8 |
0.298 |
2016 |
262.1 |
0.305 |
2017 |
256.7 |
0.310 |
2018 |
251.4 |
0.314 |
2019 |
246.2 |
0.316 |
2020 |
241.1 |
0.316 |
2021 |
235.9 |
0.314 |
2022 |
230.6 |
0.309 |
2023 |
225.1 |
0.303 |
2024 |
219.3 |
0.295 |
2025 |
213.1 |
0.285 |
2026 |
206.5 |
0.274 |
2027 |
199.4 |
0.263 |
2028 |
191.5 |
0.251 |
2029 |
183.0 |
0.240 |
2030 |
173.6 |
0.230 |
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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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