HD 28375

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HD 28375
Taurus constellation map.svg
Red circle.svg
Location of HD 28375 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 28m 32.11967s[1]
Declination +01° 22′ 50.9578″[1]
Apparent magnitude (V) 5.532[2]
Spectral type B3V[3]
U−B color index -0.55[4]
B−V color index -0.10[4]
Radial velocity (Rv)18.0 ± 4.3[5] km/s
Proper motion (μ) RA: 17.81[1] mas/yr
Dec.: -21.50[1] mas/yr
Parallax (π)8.52 ± 0.35[1] mas
Distance380 ± 20 ly
(117 ± 5 pc)
Surface gravity (log g)4[3] cgs
Temperature13,000[3] K
Rotational velocity (v sin i)13 ± 3[6] km/s
Other designations
BD+01° 757, HD 28375, HIP 20884, HR 1415, SAO 111845
Database references

HD 28375 is a star in the zodiac constellation of Taurus. Its apparent magnitude is 5.53.[2] Based on parallax estimates made by the Hipparcos spacecraft, the star is located fairly close, about 380 light-years (117 parsecs) away.[1]

HD 28375 has a spectrum matching that of an B-type main-sequence star. Its effective temperature is about 13,000 K. An infrared excess has been detected, indicating the presence of a circumstellar disk. The dust would have a temperature of about 119 K, located about 67 astronomical units away from the star.[3]

HD 28375 is also known as 44 Eridani, although the name has fallen out of use because constellations were redrawn, placing the star out of Eridanus and into Taurus.


  1. ^ a b c d e f van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. 
  3. ^ a b c d Liu, Qiong; Wang, Tinggui; Jiang, Peng (2014). "Bright Debris Disk Candidates Detected with Theakari/far-Infrared Surveyor". The Astronomical Journal. 148: 3. arXiv:1308.5593Freely accessible. Bibcode:2014AJ....148....3L. doi:10.1088/0004-6256/148/1/3. 
  4. ^ a b Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J. 
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053Freely accessible. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  6. ^ Bragança, G. A.; Daflon, S.; Cunha, K.; Bensby, T.; Oey, M. S.; Walth, G. (2012). "Projected Rotational Velocities and Stellar Characterization of 350 B Stars in the Nearby Galactic Disk". The Astronomical Journal. 144 (5): 130. arXiv:1208.1674Freely accessible. Bibcode:2012AJ....144..130B. doi:10.1088/0004-6256/144/5/130.