HD 3346
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 36m 46.441s[1] |
| Declination | +44° 29′ 18.91″[1] |
| Apparent magnitude (V) | 5.164 |
| Characteristics | |
| Spectral type | K5III |
| U−B color index | 1.97 |
| B−V color index | 1.6 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | -32.8 km/s |
| Proper motion (μ) | RA: -36.31 ± 0.21[1] mas/yr Dec.: 31.96 ± 0.18[1] mas/yr |
| Parallax (π) | 5.29 ± 0.30[1] mas |
| Distance | 620 ± 30 ly (190 ± 10 pc) |
| Absolute magnitude (MV) | 6.789 |
| Details | |
| Mass | 5[citation needed] M☉ |
| Radius | 46.27[citation needed] R☉ |
| Luminosity | 686.8[citation needed] L☉ |
| Temperature | 4350[citation needed] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 3346, also known as V428 Andromedae, is an orange giant star approximately 620 light-years away[1] in the constellation of Andromeda.
Possible planetary system
In 1996 it was announced that the variations in radial velocity of this star were larger than expected. A planetary system was proposed to explain this variation.[2][3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (unconfirmed) | 10 MJ | 0.3 | 30.0 | 0 | — | — |
| c (unconfirmed) | 60 MJ | 2.5 | 650 | 0.00 | — | — |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- ↑ Noyes, R. et al. (1996). "HD 3346". International Astronomical Union Circular (6316): 1.
- ↑ Bell, George H. (2001-04-05). "The Search for the Extrasolar Planets: A Brief History of the Search, the Findings and the Future Implications". Arizona State University. Retrieved 2008-07-16.
- The paper, HD 3346, 1996.
External links
- "HD 3346". Extrasolar Visions. Retrieved 2008-06-10.
- "HD 3346 Planetary System". Interstellar Card. Retrieved 2008-06-10.
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