HD 146624

This article is about d Scorpii. Not to be confused with δ Scorpii.
HD 146624
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 16h 18m 17.89900s[1]
Declination −28° 36′ 50.4721″[1]
Apparent magnitude (V) 4.80[2]
Characteristics
Spectral type A0 V[3]
B−V color index +0.008±0.018[2]
Astrometry
Radial velocity (Rv)−13.0±0.8[4] km/s
Proper motion (μ) RA: −31.971[1] mas/yr
Dec.: −101.295[1] mas/yr
Parallax (π)23.0018 ± 0.3267 mas[1]
Distance142 ± 2 ly
(43.5 ± 0.6 pc)
Absolute magnitude (MV)1.14[5]
Details
Mass1.49[3] or 2.13±0.02[6] M☉
Radius1.60[7] R☉
Luminosity21.46+0.53
−0.51[6] L☉
Surface gravity (log g)3.99±0.13[8] cgs
Temperature9,441+109
−108[6] K
Metallicity [Fe/H]−0.27±0.12[8] dex
Rotational velocity (v sin i)39[6] km/s
Age10[3] Myr
Other designations
d Sco, CD−28° 12037, FK5 3288, HD 146624, HIP 79881, HR 6070, SAO 184301[9]
Database references
SIMBADdata

HD 146624 (d Scorpii) is a single,[3] white-hued star in the southern zodiac constellation of Scorpius. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.80.[2] The distance to HD 146624 can be estimated from its annual parallax shift of 23.0 mas,[1] yielding a separation of 142 light years. At that distance, the visual magnitude is reduced by an extinction of 0.17 due to interstellar dust.[5] It is a member of the Beta Pictoris moving group, a set of ~12 million year old stars that share a common motion through space.[10]

This is an A-type main-sequence star with a stellar classification of A0 V,[3] and is suspected to be chemically peculiar.[11][6] It is a young star, just 10[3] million years old, with a projected rotational velocity of 39 km/s.[6] The mass of the star is greater than the Sun's, with De Rosa et al. (2014) estimating 1.49[3] times the mass of the Sun, while Zorec and Royer (2012) gives a multiplier of 2.13±0.02.[6] It has 1.60[7] times the Sun's radius and shines with 21 times the Sun's luminosity from its photosphere at an effective temperature of 9,441 K.[6]

The star displays an infrared excess, suggesting a circumstellar disk of orbiting material. This has a mean temperature of 280 K, matching a disk radius of 4.20 AU.[7]

  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 Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference deRosa2014 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 g h Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Cotten2016 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Prugniel2011 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 Zuckerman2001 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).