V448 Carinae

V448 Carinae

A light curve for V448 Carinae, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 06h 47m 18.70799s[2]
Declination −55° 32′ 23.9659″[2]
Apparent magnitude (V) 5.60[3] (5.66 to 5.86)[4]
Characteristics
Spectral type K5III[5]
B−V color index +1.549±0.010[3]
Variable type SRd:[4]
Astrometry
Radial velocity (Rv)+25.58±4.64[2] km/s
Proper motion (μ) RA: −0.99[6] mas/yr
Dec.: +25.05[6] mas/yr
Parallax (π)4.8123 ± 0.0860 mas[2]
Distance680 ± 10 ly
(208 ± 4 pc)
Absolute magnitude (MV)−0.72[3]
Details
Mass1.73[7] M☉
Radius50.90+1.15
−5.11[2] R☉
Luminosity582.2±12.9[2] L☉
Temperature3,974+216
−44[2] K
Age2.85[7] Gyr
Other designations
O Car, V448 Car, NSV 3220, CPD−55°1063, GC 8912, HD 49877, HIP 32531, HR 2526, SAO 234710[8]
Database references
SIMBADdata

V448 Carinae is a single[9] star in the constellation Carina. It has the Bayer designation O Carinae, while V448 Carinae is the variable star designation. This object has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude that fluctuates around 5.60.[3] It is located at a distance of approximately 680 light years from the Sun based on parallax, and is drifting further away with a radial velocity of around +26 km/s.[2]

This is an aging giant star with a stellar classification of K5III.[5] Having exhausted the supply of hydrogen at its core, it has cooled and expanded off the main sequence and now has 51 times the girth of the Sun.[2] It is classified as a probable semiregular variable star with a sub-type of SRd and a brightness that varies from visual magnitude 5.66 down to 5.86 over a period of 56.5 days.[4] The star is an estimated 2.85 billion years old with 1.73 times the mass of the Sun.[7] It is radiating 582 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,974 K.[2]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ 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).
  3. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference luck2015 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).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).