HD 41004
Coordinates: 
05h 59m 49.64s, −48° 14′ 22.89″
05h 59m 49.64s, −48° 14′ 22.89″| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Pictor | |
| Right ascension | 05h 59m 49.64736s[1] | |
| Declination | −48° 14′ 22.8058″[1] | |
| Apparent magnitude (V) | 8.65[2] (8.82 + 12.51)[3] | |
| Characteristics | ||
| Spectral type | K1V + M2V[4] | |
| B−V color index | 0.887±0.013[2] | |
| Absolute magnitude (MV) | 5.60[2] | |
| Details Rotational velocity (v sin i) 1.0±1.2[6] km/s | | |
| B | ||
| Mass | 0.4[7] M☉ | |
| Database references | ||
| SIMBAD | data | |
HD 41004 is a
light years based on parallax.[1] It is drifting further away from the Sun with a radial velocity of +42.5 km/s, having come to within 44.5 ly some 831,000 years ago.[2]
The primary, component A, is a
Companions
A planet,
astronomical units, taking 2.64 years with a high eccentricity
of 0.74.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.56 MJ | 1.70 | 963 | 0.74 | — | — |
| Discovery | |
|---|---|
m/s | |
| Physical characteristics | |
| Mass | ~16 MJ (most probable)[4] < ~25 MJ[4] |
HD 41004 Bb is a
tidal effect of the nearby star HD 41004 B.[9] A search for cyclotron radiation from the magnetosphere of Bb in 2020 did not find any, indicating the planet is either weakly magnetized, or the emission cone did not point to Earth at the time of observation.[10]
References
- ^ .
- ^ S2CID 119257644.
- ^ doi:10.1086/323920. Retrieved 2015-07-22.
- ^ .
- S2CID 119374557. A58.
- ^ S2CID 16080025.
- S2CID 209444271
- ^ "HD 41004". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-13.
- S2CID 14195872.
External links
- "HD 41004 A". Extrasolar Planets Encyclopaedia. Archived from the original on June 2, 2006. Retrieved 2008-07-21.
- "HD 41004 B". Extrasolar Planets Encyclopaedia. Archived from the original on July 2, 2007. Retrieved 2008-07-21.
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