08380-0844 HDS 1242 (HD 73399)
08h 37m 59.08s -08° 44' 06.4" P.A. 223.00 sep 0.2 mag 8.45,9.64 Sp G5 dist. 50.43 pc (164.5 l.y.)
| Coord 2000 |
08380-0844 |
|
Discov num |
HDS1242 |
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Comp |
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Coord arcsec 2000 |
08 37 59.08 -08 44 06.4 |
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| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
20 |
|
| Pa first |
258 |
|
Pa last |
223.1 |
|
P.A. Now (θ) |
231.6° |
|
| Sep first |
0.3 |
|
Sep last |
0.22 |
|
Sep. Now (ρ) |
0.237" |
|
| Mag pri |
8.45 |
|
Mag sec |
9.64 |
|
delta mag (ΔM) |
1.19 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+063 |
|
Sec motion ra |
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| Pri motion dec |
+052 |
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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
| Name |
HD 73399 |
|
Constellation |
Hydra |
|
SAO |
136113 |
|
HIP |
42345 |
|
| Tycho2 |
5429-00412-1 |
|
Gaia DR2 |
5753464453723072768 |
|
HD |
73399 |
|
BD |
BD-08 2434 |
|
| Distance |
50.43 |
|
Distance ly |
164.5 |
|
ORBITAL ELEMENTS
| Period (P) | 35.443y | |
Periastron (T) | 2015.291y | |
Semi-major axis (a) | 0.223a | |
| Eccentricity (e) | 0.386 | |
Inclination (i) | 16.3° | |
Longitude of periastron (ω) | 221.5° | |
| Node (Ω) | 247.8° | |
Notes | | |
Reference | Tok2018e | |
| Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
300.1 |
0.297 |
| 2001 |
305.3 |
0.292 |
| 2002 |
310.6 |
0.286 |
| 2003 |
316.3 |
0.278 |
| 2004 |
322.2 |
0.269 |
| 2005 |
328.6 |
0.259 |
| 2006 |
335.6 |
0.248 |
| 2007 |
343.2 |
0.236 |
| 2008 |
351.7 |
0.223 |
| 2009 |
1.2 |
0.210 |
| 2010 |
12.1 |
0.195 |
| 2011 |
24.8 |
0.181 |
| 2012 |
39.7 |
0.167 |
| 2013 |
57.2 |
0.153 |
| 2014 |
77.7 |
0.142 |
| 2015 |
101.0 |
0.135 |
| 2016 |
125.7 |
0.135 |
| 2017 |
149.5 |
0.141 |
| 2018 |
170.3 |
0.153 |
| 2019 |
187.6 |
0.170 |
| 2020 |
201.7 |
0.187 |
| 2021 |
213.3 |
0.205 |
| 2022 |
223.1 |
0.222 |
| 2023 |
231.6 |
0.237 |
| 2024 |
239.1 |
0.251 |
| 2025 |
245.9 |
0.264 |
| 2026 |
252.1 |
0.274 |
| 2027 |
257.8 |
0.283 |
| 2028 |
263.3 |
0.290 |
| 2029 |
268.4 |
0.296 |
| 2030 |
273.5 |
0.300 |
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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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