HD 100777
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Leo |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 8.42[2] |
| Characteristics | |
| Spectral type | G8V[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 20.1590±0.0285 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 4.95[2] |
| Details[4] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val".[5] 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[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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HD 100777 is a single[7] star with a planetary companion in the equatorial constellation of Leo.[8] With an apparent visual magnitude of 8.42 it is too faint to be viewed with the naked eye, although the absolute magnitude of 4.81 indicates it could be seen if it were just Script error: No such module "convert". away. The distance to the star is approximately 162 light-years based on parallax measurements.
The International Astronomical Union held the NameExoWorlds campaign in 2019. Nepal named the star Sagarmatha, the Nepali name of Mount Everest, and the exoplanet revolving it was named as Laligurans, the Nepali name of the flower Rhododendron.[9]
This is an ordinary G-type main-sequence star with a stellar classification of G8V.[3] It has a similar mass, size, and luminosity to the Sun. The star is roughly five[4] billion years old with an inactive chromosphere[8] and is spinning with a projected rotational velocity of 1.7 km/s.[4] A 2015 survey ruled out the existence of any additional stellar companions at projected distances from 18 to 369 astronomical units.[7]
Planetary system
In 2007, a giant exoplanet companion was found using the radial velocity method. It is orbiting HD 100777 at a distance of Script error: No such module "val". with a period of 384 days and an eccentricity (ovalness) of 0.36. The inclination of the orbital plane of this body is unknown, so only a lower limit on the mass can be determined. It has at least 1.16 times the mass of Jupiter.[8]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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- ↑ a b c d e Template:Cite Gaia DR3
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
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- ↑ Template:Cite Gaia DR2
- ↑ Template:Cite simbad
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
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