Astronomy:R Pictoris
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Short description: Variable star in the constellation Pictor
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Pictor[2] |
| Right ascension | 04h 46m 09.54631s |
| Declination | −49° 14′ 45.0615″ |
| Apparent magnitude (V) | 6.35 to 10.10[2] |
| Characteristics | |
| Evolutionary stage | AGB[3] |
| Spectral type | M1IIe-M4IIe[2] |
| Variable type | Semiregular[2] |
| Astrometry | |
| Proper motion (μ) | RA: +36.289[4] mas/yr Dec.: +37.561[4] mas/yr |
| Parallax (π) | 0.9613 ± 0.0233[4] mas |
| Distance | 3,390 ± 80 ly (1,040 ± 30 pc) |
| Details | |
| Mass | 2.4[5] M☉ |
| Radius | 177[6] R☉ |
| Luminosity | 4,296[7] L☉ |
| Surface gravity (log g) | 1.25[5] cgs |
| Temperature | 3,353[6] K |
| Metallicity [Fe/H] | −0.45[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
R Pictoris is a semiregular variable type star in the constellation Pictor. It ranges between apparent magnitude 5.1 and 14.4, and spectral types M1IIe to M4IIe, over a period of 168 days.[2] It should be faintly visible to the naked eye of an observer with excellent observing conditions, when it is near its maximum brightness.
In 1895, Williamina Fleming discovered that the star is a variable star.[9] In 1907 it appeared with its variable star designation, R Pictoris, in Annie Jump Cannon's Second Catalog of Variable Stars.[10]
References
- ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. http://www.astrouw.edu.pl/asas/?page=aasc.
- ↑ 2.0 2.1 2.2 2.3 2.4 Otero, Sebastian Alberto (7 June 2011). "R Pictoris". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=26334. Retrieved 23 May 2014.
- ↑ Suh, Kyung-Won (2024). "Infrared Properties of Carbon Stars in Our Galaxy". The Astrophysical Journal Supplement Series 272 (1): 16. doi:10.3847/1538-4365/ad38b5. Bibcode: 2024ApJS..272...16S.
- ↑ 4.0 4.1 4.2 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 5.0 5.1 5.2 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ 6.0 6.1 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ Gaia Collaboration et al. (2018). "Gaia Data Release 2. Summary of the contents and survey properties". Astronomy and Astrophysics 616. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
- ↑ "R Pictoris". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=R+Pictoris.
- ↑ "R Pic". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=26334.
- ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1–94. Bibcode: 1907AnHar..55....1C.
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