HD 107914
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| CCDM J12242-3855A | |
| Right ascension | 12h 24m 13.0s[1] |
| Declination | –38° 54′ 50″[1] |
| Apparent magnitude (V) | 7.0[1] |
| CCDM J12242-3855B | |
| Right ascension | 12h 24m 13.2s[1] |
| Declination | –38° 54′ 47″[1] |
| Apparent magnitude (V) | 12.8[1] |
| Characteristics | |
| Spectral type | A7/8III[2] |
| B−V color index | 0.272[3] |
| Astrometry | |
| Proper motion (μ) | RA: +0.55[4] mas/yr Dec.: –0.02[4] mas/yr |
| Parallax (π) | 12.77 ± 0.46 mas |
| Distance | 255 ± 9 ly (78 ± 3 pc) |
| Other designations | |
HD 107914 is a binary star in the constellation Centaurus, with an estimated distance of 255.5 light-years (78.3 pc)[5] from the Solar System. The primary has a stellar classification of A7-8 III, making it a giant star.
Measurement of the proper motion of this system show that it has a low transverse velocity relative to the Sun. For this reason, it has been compared to the hypothetical "Nemesis" star since it may pass through the Oort cloud in the future.[5] The star is too far away to be a companion to the Sun. However, preliminary measurements of the H-alpha line in the star's spectrum show a radial velocity in the range from –13 to +3 km/s. (This result was obtained by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona.[6]) Such values for the radial velocity are too small to produce a likely collision course with the Solar System. For example, if Vr = –10 km/s, then the distance from the Sun to HD 107914 at closest approach will be about 5.2 ly (1.6 pc).
References
- 1 2 3 4 5 6 "CCDM J12242-3855. Vizier detailed page.". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ↑ "CCDM J12242-3855AB. Double or multiple star.". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ↑ "HIP 60503. VizieR detailed page.". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- 1 2 "Detailed description of I/311.". Hipparcos. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- 1 2 Potemine, Igor Yu. (2010-04-13). "Giant Nemesis candidate HD 107914 / HIP 60503 for the perforation of Oort cloud". arXiv:1003.5308
[astro-ph.SR]. - ↑ Eaton, J. A.; Williamson M. H. (2007). "The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants". PASP. 119: 886–897. Bibcode:2007PASP..119..886E. doi:10.1086/521231.