HD 33875
Observation data
Epoch J2000      Equinox J2000
Constellation Mensa
Right ascension 05h 06m 09.2953s[1]
Declination −73° 02′ 15.6159″[1]
Apparent magnitude (V) 6.26 ± 0.01[2]
Characteristics
Spectral type A1 V[3] or A0 V[4]
U−B color index −0.01[5]
B−V color index +0.01[5]
Astrometry
Radial velocity (Rv)8 ± 7.4[6] km/s
Proper motion (μ) RA: +17.783[1] mas/yr
Dec.: +63.090[1] mas/yr
Parallax (π)7.742 ± 0.0276 mas[1]
Distance421 ± 2 ly
(129.2 ± 0.5 pc)
Absolute magnitude (MV)+0.7
Details
Mass2.31 ± 0.41[7] M☉
Radius2.84 ± 0.35[7] R☉
Luminosity49.2[8] L☉
Surface gravity (log g)4[9] cgs
Temperature9,392[10] K
Rotational velocity (v sin i)124 ± 6[10] km/s
Age411[11] Myr
Other designations
20 G. Mensae, CD−73°219, CPD−73°286, FK5 2388, GC 6313, HD 33875, HIP 23737, HR 1700, SAO 256160
Database references
SIMBADdata

HD 33875 (HR 1700) is a solitary star in the southern circumpolar constellation Mensa. With an apparent magnitude of 6.26,[2] it is barely visible to the naked eye under ideal conditions. The star is located at a distance of 421[1] light years but is receding at a rate of 8 km/s.[6]

HD 33875 is an ordinary A-type main-sequence star with a stellar classification of either A1 V[3] or A0 V[4] depending on the source. At present it has 2.38 times the mass of the Sun[7] and 2.84 times the radius of the Sun.[7] It shines at 49.2 times the Sun's luminosity[8] from its photosphere at an effective temperature of 9,392 K,[10] which gives it a white glow. HD 33875 is a fast rotator, spinning rapidly with a projected rotational velocity of 124 km/s.[10]

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. 1 2 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  4. 1 2 Buscombe, W. (1 May 1969). "Line Strengths for Southern OB stars--II: Observations with Moderate Dispersion". Monthly Notices of the Royal Astronomical Society. 144 (1): 31–39. Bibcode:1969MNRAS.144...31B. doi:10.1093/mnras/144.1.31. ISSN 0035-8711.
  5. 1 2 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. 1 2 Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (November 2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889–896. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. ISSN 0004-6337.
  7. 1 2 3 4 Stassun, Keivan G.; et al. (September 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. ISSN 0004-6256.
  8. 1 2 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
  9. ↑ Kordopatis, G.; et al. (17 October 2013). "The Radial Velocity Experiment (Rave): Fourth Data Release". The Astronomical Journal. 146 (5): 134. arXiv:1309.4284. Bibcode:2013AJ....146..134K. doi:10.1088/0004-6256/146/5/134. ISSN 0004-6256. S2CID 2532948.
  10. 1 2 3 4 Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.
  11. ↑ "Digital Demo Room - Stellar Structure and Evolution Simulator". rainman.astro.illinois.edu. Retrieved 30 December 2021.
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