HD 24040
Coordinates: 
03h 50m 22.9681s, +17° 28′ 34.919″
03h 50m 22.9681s, +17° 28′ 34.919″| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 50m 22.9678s[1] |
| Declination | +17° 28′ 34.9254″[1] |
| Apparent magnitude (V) | 7.50[2] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G2V[3] |
| B−V color index | 0.653±0.003[2] |
| Absolute magnitude (MV) | 4.16[2] |
| Details | |
Gyr | |
NLTT 11955[6] | |
| Database references | |
| SIMBAD | data |
HD 24040 is a
light years. However, it is drifting closer to the Sun with a radial velocity of −9.4 km/s.[2]
This is a
projected rotational velocity of 2.4 km/s.[5]
Planetary system
A long period planet was discovered in 2006 based on observations made at the W. M. Keck Observatory in Hawaii. However because the observations covered less than one complete orbit there were only weak constraints on the period and mass.[5] The first reliable orbit for HD 24040b was obtained by astronomers at Haute-Provence Observatory in 2012 who combined the keck measurements with ones from the SOPHIE and ELODIE spectrographs.[7] The most recent orbit published in 2015 added additional keck measurements and refined the orbital parameters.[8]
A linear trend in the
HD 24040 c.[9]
Planet c is in the
habitable zone, with an ecc of <0.2, and may have a habitable moon
.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
c
|
≥0.201±0.027 MJ | 1.3±0.021 | 515.4+2.2 −2.5 |
0.11+0.120 −0.079 |
— | — |
| b | >4.10±0.12 MJ | 4.637±0.067 | 3490±25 | 0.047±0.020 | — | — |
See also
- HD 154345
- List of extrasolar planets
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ S2CID 119257644.
- ^ .
- ^ S2CID 54555839.
- ^ S2CID 35682784.
- ^ "HD 24040". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-12-12.
- ^ S2CID 119109836
- ^ S2CID 56390823.
- ^ S2CID 235186973
External links
- "Notes for star HD 24040". Extrasolar Planets Encyclopaedia. Archived from the original on February 24, 2007.
