HD 88981

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.

  1. ^ a b c d e f g h i j Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Hoffleit1953 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Stassun2018 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Huang1953 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).