Delta Caeli

Delta Caeli

Location of δ Caeli (lower middle)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Caelum
Right ascension 04h 30m 50.09903s[1]
Declination −44° 57′ 13.5035″[1]
Apparent magnitude (V) +5.06[2]
Characteristics
Spectral type B2 IV-V[3]
U−B color index −0.78[2]
B−V color index −0.20[2]
Astrometry
Radial velocity (Rv)14.2±0.8[4] km/s
Proper motion (μ) RA: +1.64[1] mas/yr
Dec.: −3.09[1] mas/yr
Parallax (π)4.63 ± 0.19 mas[1]
Distance700 ± 30 ly
(216 ± 9 pc)
Absolute magnitude (MV)−1.35[5]
Details
Mass7.65±0.48[6] M☉
Radius3.9[7] R☉
Luminosity (bolometric)2,578[6] L☉
Temperature21,150[6] K
Age9.4±0.6[8] Myr
Other designations
δ Cae, CD−45° 1567, FK5 167, HD 28873, HIP 21060, HR 1443, SAO 216850[9]
Database references
SIMBADdata

Delta Caeli (δ Caeli) is a solitary,[10] blue-white hued star in the southern constellation of Caelum. It is a dim star but visible to the naked eye, having an apparent visual magnitude of +5.06.[2] Based upon an annual parallax shift of 4.63 mas as seen from Earth,[1] this star is located roughly 700 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.13 due to interstellar dust.[5]

This is a B-type star with a stellar classification of B2 IV-V,[3] where the luminosity class IV-V indicates the spectrum shows mixed traits of a subgiant star and a main sequence star. It has 7−8[6] times the mass of the Sun and about 3.9[7] times the Sun's radius. The star is around nine million years old and is radiating 2,578[6] times the Sun's luminosity from its photosphere at an effective temperature of 21,150 K.[6]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Hogg1958 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Fracassini2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).