HD 73526
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +8.99[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | G6 V[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Variable type | Constant[3] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: −60.993 mas/yr[1] Dec.: 159.192 mas/yr[1] |
| Parallax (π) | 10.3311±0.0144 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | Script error: No such module "val".[5] |
| Absolute bolometric magnitude (Mbol) | Script error: No such module "val".[5] |
| Details[4] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val".[6] Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Rotational velocity (v sin i) | Script error: No such module "val". km/s |
| Age | Script error: No such module "val". Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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HD 73526 is a star in the southern constellation of Vela. With an apparent visual magnitude of +8.99,[2] it is much too faint to be viewed with the naked eye. The star is located at a distance of approximately Script error: No such module "convert". from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +26 km/s.[4] It is a member of the thin disk population.[4]
The stellar classification of HD 73526 is G6 V,[3] indicating this is a G-type main-sequence star that, like the Sun, is generating energy through core hydrogen fusion. Based on its properties, it may be starting to evolve off the main sequence.[3] This star has slightly more mass than the Sun and a 53% greater radius. The abundance of iron in its atmosphere suggests the star's metallicity – what astronomers term the abundance of elements with higher atomic number than helium – is 70% greater than in the Sun. It is a much older star with an estimated age of nearly ten billion years, and is spinning slowly with a projected rotational velocity of 1.7 km/s. The star is radiating more than double the luminosity of the Sun from its photosphere at an effective temperature of 5,564 K.[4]
Planetary system
On June 13 2002,[8] a 2.1 MJ planet HD 73526 b was announced orbiting HD 73526 in an orbit just a little smaller than that of Venus' orbit around the Sun.[5] This planet receives an insolation 3.65 times that of Earth or 1.89 times that of Venus. This was a single planet system until 2006 when a 2.3 MJ second planet HD 73526 c was discovered. These planets forms a 2:1 orbital resonance with planet b.[3] In fact, they seem to be in a very deep resonance with very long timescale stability due to an ACR (Apsidal Corotation Resonance) the planets seem to satisfy.[9] Although these are minimum masses as the inclinations of these planets are unknown, orbital stability analysis indicates that the orbital inclinations of both planets are likely to be near 90°, making the minimum masses very close to the true masses of the planets.[10]
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See also
References
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- ↑ a b c d e Template:Cite Gaia DR3
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- ↑ Template:Cite simbad
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External links
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- Extrasolar Planet Interactions Template:Webarchive by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona