Lambda Capricorni

Lambda Capricorni
Location of λ Capricorni (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Capricornus
Right ascension 21h 46m 32.09739s[1]
Declination −11° 21′ 57.4391″[1]
Apparent magnitude (V) +5.56[2]
Characteristics
Spectral type A1 V[3]
B−V color index −0.01[2]
Astrometry
Radial velocity (Rv)−2.4[4] km/s
Proper motion (μ) RA: +28.92[1] mas/yr
Dec.: −9.66[1] mas/yr
Parallax (π)11.58 ± 0.30 mas[1]
Distance282 ± 7 ly
(86 ± 2 pc)
Absolute magnitude (MV)+0.89[5]
Details
Mass2.50[6] M☉
Radius2.2[7] R☉
Luminosity45[5] L☉
Surface gravity (log g)4.15±0.14[6] cgs
Temperature10,674±363[6] K
Rotational velocity (v sin i)192.5±5.7[8] km/s
Age155[6] Myr
Other designations
λ Cap, 48 Cap, BD−12° 6087, FK5 818, HD 207052, HIP 107517, HR 8319, SAO 164639[9]
Database references
SIMBADdata

Lambda Capricorni, Latinized from λ Capricorni, is a solitary[10] star in the southern constellation of Capricornus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.56.[2] Based upon an annual parallax shift of 11.58 mas as seen from the Earth,[1] the star is located about 282 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.11 due to interstellar dust.[11]

This is a white-hued A-type main sequence star with a stellar classification of A1 V.[3] It is a magnetic Ap star, indicating the spectrum displays chemically peculiar features.[8] The star has an estimated 2.50[6] times the mass of the Sun and about 2.2[7] times the Sun's radius. It is 155[6] million years old and is spinning rapidly with a projected rotational velocity of 192.5 km/s.[8] Lambda Capricorni is radiating 45[5] times the Sun's luminosity from its photosphere at an effective temperature of 10,674 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 Cite error: The named reference Corben1968 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Royer2007 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Wraight2012 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).
  11. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).