09310-1544 BU 339 (HD 82339)
09h 30m 57.03s -15° 44' 19.6" P.A. 252.00 sep 1.3 mag 8.95,9.76 Sp F6/7V dist. 131.75 pc (429.77 l.y.)
Coord 2000 |
09310-1544 |
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Discov num |
BU 339 |
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Comp |
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Coord arcsec 2000 |
09 30 57.03 -15 44 19.6 |
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Date first |
1875 |
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Date last |
2017 |
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Obs |
24 |
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Pa first |
220 |
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Pa last |
251.7 |
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P.A. Now (θ) |
251.7° |
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Sep first |
1.1 |
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Sep last |
1.29 |
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Sep. Now (ρ) |
1.29" |
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Mag pri |
8.95 |
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Mag sec |
9.76 |
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delta mag (ΔM) |
0.81 |
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Spectral class |
F6/7V (yellow-white) |
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Pri motion ra |
-047 |
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Sec motion ra |
-047 |
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Pri motion dec |
+025 |
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Sec motion dec |
+025 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 82339 |
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Constellation |
Hydra |
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HIP |
46676 |
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Tycho2 |
6030-00295-1 |
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Gaia DR2 |
5688362851279032192 |
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HD |
82339 |
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ADS |
7409 |
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BD |
BD-15 2821 |
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Distance |
131.75 |
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Distance ly |
429.77 |
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ORBITAL ELEMENTS
Period (P) | 1111.1451y | ± 533.1715 |
Periastron (T) | 1819.7956y | ± 38.3097 |
Semi-major axis (a) | 2.98769a | ± 1.89105 |
Eccentricity (e) | 0.80636 | ± 0.15908 |
Inclination (i) | 75.137° | ± 8.338 |
Longitude of periastron (ω) | 103.675° | ± 14.998 |
Node (Ω) | 23.148° | ± 14.232 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2001 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
246.2 |
1.284 |
2001 |
246.5 |
1.282 |
2002 |
246.7 |
1.281 |
2003 |
247.0 |
1.279 |
2004 |
247.3 |
1.278 |
2005 |
247.5 |
1.276 |
2006 |
247.8 |
1.275 |
2007 |
248.1 |
1.273 |
2008 |
248.4 |
1.272 |
2009 |
248.6 |
1.271 |
2010 |
248.9 |
1.269 |
2011 |
249.2 |
1.268 |
2012 |
249.4 |
1.266 |
2013 |
249.7 |
1.265 |
2014 |
250.0 |
1.263 |
2015 |
250.3 |
1.262 |
2016 |
250.5 |
1.261 |
2017 |
250.8 |
1.259 |
2018 |
251.1 |
1.258 |
2019 |
251.4 |
1.256 |
2020 |
251.7 |
1.255 |
2021 |
251.9 |
1.254 |
2022 |
252.2 |
1.252 |
2023 |
252.5 |
1.251 |
2024 |
252.8 |
1.250 |
2025 |
253.1 |
1.248 |
2026 |
253.3 |
1.247 |
2027 |
253.6 |
1.246 |
2028 |
253.9 |
1.244 |
2029 |
254.2 |
1.243 |
2030 |
254.5 |
1.242 |
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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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