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| spectral = G2/G3 |
| spectral = G2/G3 |
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| names = BD+20°2374, FK5 4836, GC 12951, HIP 46070, SAO 80800 |
| names = BD+20°2374, FK5 4836, GC 12951, HIP 46070, SAO 80800 |
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| Simbad = HD+81040 |
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'''HD 81040''' is a [[star]] in the [[constellation]] of [[Leo (constellation)|Leo]]. It is G-type [[yellow dwarf]] like our [[Sun]]. |
'''HD 81040''' is a [[star]] in the [[constellation]] of [[Leo (constellation)|Leo]]. It is G-type [[yellow dwarf]] like our [[Sun]]. |
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The Sun dwarfs HD 81040 in terms of physical characteristics. The age of the star is not precisely known, the [[ELODIE spectrograph]] suggested the age of 0.8 Gyr and found to have young dust disk. Later measurements by modelling [[chromosphere|chromosperic]] activity suggested the age of 4.18 Gyr. |
The Sun dwarfs HD 81040 in terms of physical characteristics. The age of the star is not precisely known, the [[ELODIE spectrograph]] suggested the age of 0.8 Gyr and found to have young dust disk. Later measurements by modelling [[chromosphere|chromosperic]] activity suggested the age of 4.18 Gyr. |
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== Planetary system == |
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On [[November 24]], [[2005]], the date of [[Thanksgiving]] day, the superjovian planet was announced by Sozzetti. |
On [[November 24]], [[2005]], the date of [[Thanksgiving]] day, the [[superjovian]] [[planet]] was announced by Sozzetti. |
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{{clear}} |
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{{PlanetboxOrbit begin}} |
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{{PlanetboxOrbit |
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{{Extrasolar Planet |
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| exoplanet = [[HD 81040 b|b]] |
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| ⚫ | |||
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| semimajor = 1.94 |
| semimajor = 1.94 |
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| eccentricity = 0.526 ± 0.042 |
| eccentricity = 0.526 ± 0.042 |
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| ⚫ | |||
| ⚫ | |||
{{PlanetboxOrbit end}} |
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| ang_dist = 59.582 |
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| long_peri = 81.3 ± 7.2 |
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| ⚫ | |||
| t_peri = 2452504 ± 12 |
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* [[List of stars with confirmed extrasolar planets]] |
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| semi-amp = 168 ± 9 |
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| temperature = 170 |
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| discovery_date = [[November 24]], [[2005]] |
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| discoverers = Sozzetti et al. |
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| discovery_method = Doppler Spectroscopy |
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| ⚫ | |||
'''HD 81040 b''' is a massive, Jupiter-sized [[gas giant]] [[extrasolar planet|planet]] that orbits the star HD 81040. The [[orbital period|period]] is just over 1000 [[day]]s. It has [[semimajor axis]] of 1.94 [[Astronomical Unit|AU]]. However, the orbit is extremely [[Orbital eccentricity|eccentric]], little over 0.5 in value. The planet occasionally passes through the [[habitable zone]]. It is likely that it may have [[extrasolar moon|moons]]. |
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==References== |
==References== |
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== External links == |
== External links == |
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* [http://vo.obspm.fr/exoplanetes/encyclo/star.php?st=HD+81040 '''The Extrasolar Planets Encyclopaedia:''' HD 81040 |
* [http://vo.obspm.fr/exoplanetes/encyclo/star.php?st=HD+81040 '''The Extrasolar Planets Encyclopaedia:''' HD 81040] |
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* [http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=HD+81040&NbIdent=1&Radius=10&Radius.unit=arcmin&submit=submit+id '''SIMBAD:''' HD 81040] |
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[[Category:G-type main sequence stars]] |
[[Category:G-type main sequence stars]] |
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[[Category:HIP objects|46070]] |
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[[Category:Leo constellation]] |
[[Category:Leo constellation]] |
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[[Category:Extrasolar planets]] |
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[[Category: |
[[Category:Planetary systems]] |
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[[de:HD 81040]] |
[[de:HD 81040]] |
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| ⚫ | |||
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | 09h23m 47.0873s |
| Declination | +20° 21' 52.034" |
| Apparent magnitude (V) | +7.74 |
| Distance | 106.2 ly (32.56 pc) |
| Spectral type | G2/G3 |
| Other designations | |
BD+20°2374, FK5 4836, GC 12951, HIP 46070, SAO 80800 | |
| Database references | |
| SIMBAD | data |
HD 81040 is a star in the constellationofLeo. It is G-type yellow dwarf like our Sun. The Sun dwarfs HD 81040 in terms of physical characteristics. The age of the star is not precisely known, the ELODIE spectrograph suggested the age of 0.8 Gyr and found to have young dust disk. Later measurements by modelling chromosperic activity suggested the age of 4.18 Gyr.
OnNovember 24, 2005, the date of Thanksgiving day, the superjovian planet was announced by Sozzetti.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >6.86 ± 0.71 MJ | 1.94 | 1001.7 ± 7 | 0.526 ± 0.042 | — | — |
{{cite journal}}: CS1 maint: multiple names: authors list (link) | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
