HD 137058

This article is about k Lupi. Not to be confused with κ (kappa) Lupi.
HD 137058
Observation data
Epoch J2000      Equinox J2000
Constellation Lupus
Right ascension 15h 25m 20.20923s[1]
Declination −38° 44′ 00.8803″[1]
Apparent magnitude (V) 4.60[2]
Characteristics
Spectral type A0 V[3]
B−V color index 0.000±0.015[2]
Astrometry
Radial velocity (Rv)−3.0±2.8[4] km/s
Proper motion (μ) RA: −41.573[1] mas/yr
Dec.: −24.603[1] mas/yr
Parallax (π)13.6178 ± 0.4759 mas[1]
Distance240 ± 8 ly
(73 ± 3 pc)
Absolute magnitude (MV)−0.76[2]
Details
Radius3.0[5] R☉
Luminosity155.71[6] L☉
Temperature8,178[6] K
Rotational velocity (v sin i)300.0[7] km/s
Other designations
k Ser, CD−38° 10289, HD 137058, HIP 75501, HR 5724, SAO 206616[8]
Database references
SIMBADdata

HD 137058 is a star in the southern constellation of Lupus. Eggleton and Tokovinin (2008) list it as a single star,[9] although Nitschelm and David (2011) noted it may be a double-lined spectroscopic binary.[10] Its apparent visual magnitude is 4.60,[2] which is bright enough to be visible to the naked eye. Based upon an annual parallax shift of 13.6 mas,[1] it is located 240 light years away.

The stellar classification of the primary component is A0 V,[3] matching an A-type main-sequence star. It is spinning rapidly with a projected rotational velocity of 300 km/s, giving it an oblate shape with an equatorial radius 22% larger than the polar radius.[7] The star is radiating 156 times the Sun's luminosity from its photosphere at an effective temperature of 8,178 K.[6]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 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. ^ Cite error: The named reference cadars2001 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference vanBelle2012 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).
  10. ^ Cite error: The named reference Nitschelm2011 was invoked but never defined (see the help page).