R Pictoris
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Pictor |
| Right ascension | 04h 46m 09.54631s |
| Declination | −49° 14′ 45.0615″ |
| Apparent magnitude (V) | 6.35 to 10.10 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M1IIe-M4IIe |
| Variable type | Semiregular |
| Astrometry | |
| Proper motion (μ) | RA: +36.289 mas/yr Dec.: +37.561 mas/yr |
| Parallax (π) | 0.9613±0.0233 mas |
| Distance | 3,390 ± 80 ly (1,040 ± 30 pc) |
| Details | |
| Mass | 2.4 M☉ |
| Radius | 177 R☉ |
| Luminosity | 4,296 L☉ |
| Surface gravity (log g) | 1.25 cgs |
| Temperature | 3,353 K |
| Metallicity [Fe/H] | −0.45 dex |
| Other designations | |
| CD−49°1439, HD 30551, HIP 22170, SAO 216987 | |
| 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. 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. In 1907 it appeared with its variable star designation, R Pictoris, in Annie Jump Cannon's Second Catalog of Variable Stars.
References
- ↑ "ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.
- 1 2 3 4 5 Otero, Sebastian Alberto (7 June 2011). "R Pictoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 23 May 2014.
- ↑ Suh, Kyung-Won (2024). "Infrared Properties of Carbon Stars in Our Galaxy". The Astrophysical Journal Supplement Series. 272 (1): 16. arXiv:2403.18290. Bibcode:2024ApJS..272...16S. doi:10.3847/1538-4365/ad38b5.
- 1 2 3 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 3 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
- 1 2 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ↑ Gaia Collaboration; et al. (2018). "Gaia Data Release 2. Summary of the contents and survey properties". Astronomy and Astrophysics. 616. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
- ↑ "R Pictoris". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-05-20.
- ↑ "R Pic". The International Variable Star Index. AAVSO. Retrieved 16 December 2024.
- ↑ 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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