HD 88981

Today, we want to delve into the fascinating world of HD 88981. This topic is undoubtedly one of the most important and relevant today, since HD 88981 has a significant impact on different areas of our lives. From its influence on society, culture, politics and the economy, to its importance in our personal and professional lives, HD 88981 plays a crucial role in the way we understand and confront the world around us. Throughout this article, we will explore the different aspects and dimensions of HD 88981, examining its impact and relevance in various contexts. We hope this exploration will give us a deeper and more complete understanding of HD 88981, as well as a greater appreciation for its importance in our lives.

This article is about M Carinae. For m Carinae, see HD 83944.
M Carinae
Location of M Carinae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 10h 13m 30.6318s[1]
Declination −66° 22′ 22.1166″[1]
Apparent magnitude (V) 5.154±0.009[2]
Characteristics
Spectral type kA8 mF4 III[3]
U−B color index +0.18[4]
B−V color index +0.22[4]
Astrometry
Radial velocity (Rv)−15.2 ± 2[5] km/s
Proper motion (μ) RA: −34.330[1] mas/yr
Dec.: +11.333[1] mas/yr
Parallax (π)10.5045±0.1031 mas[1]
Distance310 ± 3 ly
(95.2 ± 0.9 pc)
Details
Mass2.14±0.40[6] M☉
Radius4.45+0.35
−0.16[1] R☉
Luminosity62.9±0.7[1] L☉
Surface gravity (log g)3.52±0.39[6] cgs
Temperature7,706+142
−289[1] K
Rotational velocity (v sin i)60[7] km/s
Other designations
M Carinae, CPD−65°1273, GC 14066, HD 88981, HIP 50083, HR 4025, SAO 250880, GSC 08955-01326[8]
Database references
SIMBADdata

M Carinae (HD 88981) is a solitary star in the constellation Carina. It has an apparent magnitude of +5.154,[2] making it faintly visible to the naked eye under ideal and is located approximately 310[1] light-years from Earth. With a heliocentric radial velocity of −15.2 km/s[5] M Carinae is drifting closer to the Solar System.

M Car has a stellar classification of kA8 mF4 III[3] which indicates that it has the calcium K-line and surface temperature of an A8 star and the metallic lines of an evolved F-type giant that has just exhausted hydrogen fusion at its core. At present M Car has 2.14[6] times the mass of the Sun but has mildly expanded to 4.45 times its girth. It shines at a luminosity almost 63 times greater than the Sun from its bloated photosphere at an effective temperature of 7,706 K, [1] which gives it the white glow of an A-type star. M Car spins moderately at a projected rotational velocity of 60 km/s,[7] slightly faster than most Am stars.

References

  1. ^ a b c d e f g h i j 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.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ a b Hoffleit, Dorrit (1953). "The spectra and absolute magnitudes of 500 A3 - G2 stars". Annals of Harvard College Observatory. 119: 1–35. Bibcode:1953AnHar.119....1H.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  5. ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication: 0. Bibcode:1953GCRV..C......0W.
  6. ^ a b c Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R. (September 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. ISSN 0004-6256.
  7. ^ a b Huang, Su-Shu (September 1953). "A Statistical Study of the Rotation of the Stars". The Astrophysical Journal. 118: 285. Bibcode:1953ApJ...118..285H. doi:10.1086/145751. ISSN 0004-637X.
  8. ^ "HR 4025". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-02-25.