HD 121474
In this article, we will explore the topic of HD 121474 in depth, analyzing its most relevant aspects and its impact in different contexts. From its origins to its current evolution, we will delve into the details that have characterized HD 121474 over time, as well as the future perspectives that are envisioned around this topic. Through a multidisciplinary approach, we will examine how HD 121474 has influenced different areas, from culture to science, politics and society in general. Likewise, we will reflect on the implications that HD 121474 has had on people's daily lives, as well as on the global panorama. Ultimately, this article seeks to provide a comprehensive view of HD 121474, providing the reader with a deep and enriching understanding of this exciting topic.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 57m 38.88181s[1] |
| Declination | −63° 41′ 12.1069″[1] |
| Apparent magnitude (V) | 4.701[2] |
| Characteristics | |
| Spectral type | K1.5IIIb:[3] |
| B−V color index | +1.101[2] |
| Astrometry | |
| Radial velocity (Rv) | +21.90±0.17[1] km/s |
| Proper motion (μ) | RA: −39.880[1] mas/yr Dec.: −33.867[1] mas/yr |
| Parallax (π) | 15.3516±0.1607 mas[1] |
| Distance | 212 ± 2 ly (65.1 ± 0.7 pc) |
| Absolute magnitude (MV) | 0.67[4] |
| Details | |
| Radius | 12.76+0.18 −0.21[1] R☉ |
| Luminosity | 70.3±0.9[1] L☉ |
| Surface gravity (log g) | 2.75[2] cgs |
| Temperature | 4,679+40 −32[1] K |
| Metallicity | −0.01[2] dex |
| Other designations | |
| CPD−63°3070, FK5 514, HD 121474, HIP 68191, HR 5241, SAO 252531[5] | |
| Database references | |
| SIMBAD | data |
HD 121474 is a single[6] star in the southern constellation of Centaurus, near the southern constellation border with Circinus. It is an orange-hued star and is faintly visible to the naked eye with an apparent visual magnitude of 4.70.[2] This object is located at a distance of approximately 212 light years based on parallax, and it has an absolute magnitude of 0.67.[4] It is drifting further away from the Sun with a radial velocity of +22 km/s.[1]
This is an aging giant star with a stellar classification of K1.5IIIb:,[3] having exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 13[1] times the girth of the Sun, with a near-solar metallicity of −0.01.[2] The star is radiating 70 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,679 K.[1]
References
- ^ a b c d e f g h i j k l Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f Jones, K. L.; et al. (June 1992), "Spectroscopic investigation of cool giants and the authenticity of their reported microwave emission", Monthly Notices of the Royal Astronomical Society, 256 (3): 535–544, Bibcode:1992MNRAS.256..535J, doi:10.1093/mnras/256.3.535.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ "HD 121474". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-30.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
