HD 107914: Difference between revisions
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}}</ref> 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.<ref>{{cite journal |doi=10.1086/521231 |last=Eaton |first=J. A. |author2=Williamson M. H. |title=The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants|date=2007 |journal=PASP |volume=119 |pages=886–897|bibcode = 2007PASP..119..886E }}</ref>) Such values for the [[radial velocity]] are too small to produce a likely collision course with the [[Solar System]]. For example, if ''V<sub>r</sub>'' = –10 km/s, then the distance from the Sun to HD 107914 at closest approach will be about {{Convert|5.2|ly|pc|abbr=on|lk=off}}. |
}}</ref> 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 [[stellar spectrum|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.<ref>{{cite journal |doi=10.1086/521231 |last=Eaton |first=J. A. |author2=Williamson M. H. |title=The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants|date=2007 |journal=PASP |volume=119 |pages=886–897|bibcode = 2007PASP..119..886E }}</ref>) Such values for the [[radial velocity]] are too small to produce a likely collision course with the [[Solar System]]. For example, if ''V<sub>r</sub>'' = –10 km/s, then the distance from the Sun to HD 107914 at closest approach will be about {{Convert|5.2|ly|pc|abbr=on|lk=off}}. |
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==References== |
==References== |
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Revision as of 21:44, 21 February 2018
| 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 | |
| Database references | |
| SIMBAD | data |
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
- ^ a b c d e f "CCDM J12242-3855. Vizier detailed page". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ "CCDM J12242-3855AB". 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.
- ^ a b "Detailed description of I/311". Hipparcos. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13.
- ^ a b 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].
{{cite arXiv}}: Cite has empty unknown parameter:|1=(help) - ^ 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.
