HD 37320 (HR 1920, HIP 26487) is a star located in the constellation Orion.[a] It is an evolved blue giant star, based on its spectral type of B8III.[1] The distance to HD 37320 is calculated at 285.5 parsecs (931 light-years), based on a parallax from Gaia EDR3.[2] The apparent magnitude of the star is 5.852,[1] which is above the limiting magnitude for naked-eye vision (6.5m), making it faintly visible to the naked eye.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion[a] |
| Right ascension | 05h 38m 01.12s[1] |
| Declination | 07° 32′ 29.1″[1] |
| Apparent magnitude (V) | 5.852±0.009[1] |
| Characteristics | |
| Evolutionary stage | Blue giant |
| Spectral type | B7III[1] |
| Apparent magnitude (U) | 5.44[1] |
| Apparent magnitude (B) | 5.788[1] |
| Apparent magnitude (G) | 5.844[1] |
| Apparent magnitude (J) | 5.933[1] |
| Apparent magnitude (H) | 5.997[1] |
| Apparent magnitude (K) | 5.964[1] |
| Astrometry | |
| Radial velocity (Rv) | 20.1±1[4] km/s |
| Proper motion (μ) | RA: 10.602 mas/yr[4] Dec.: -15.499 mas/yr[4] |
| Parallax (π) | 3.5025 ± 0.0568 mas[2] |
| Distance | 930 ± 20 ly (286 ± 5 pc) |
| Absolute magnitude (MV) | -1.43[5] |
| Details | |
| Mass | 5.644±0.282[6] M☉ |
| Radius | 4.696[b] R☉ |
| Luminosity | 218.78[8] L☉ |
| Temperature | 12,303[8] K |
| Rotational velocity (v sin i) | 25[9] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Characteristics
editIt is an evolved blue giant star with a spectral type of B8III.[1] It radiates about 219 times the solar luminosity by its photosphere at an effective temperature of 12,300 K.[8] Its uniform disk angular diameter is measured at 0.153 milliarcseconds.[7] At the estimated distance by Gaia EDR3, it yields a physical size of 4.696 R☉. The star has a mass of 5.644 M☉[6] and rotates under its own axis at a speed of 25 km/s.[9]
HD 37320 is located within the constellation Orion, based on its astronomical coordinates.[a] The distance to the star is 285.5 parsecs (931 light-years), based on a parallax of 3.5025 mas from Gaia EDR3.[2] The apparent magnitude of the star, i.e. its brightness as seen from Earth, is of 5.852m,[1] which is above the limiting magnitude for naked-eye vision, generally defined as 6.5m, making it faintly visible to the naked eye.[3] The absolute magnitude of HD 37320, i.e. its brightness if it was seen at 10 parsecs (32.6 ly), is -1.43.[5] It is moving away from Earth at a velocity of 20.1 km/s.[4]
HD 37320 is the Henry Draper Catalogue designation for this star. Other designations include HR 1920 from the Bright Star Catalogue, HIP 26487 from the Hipparcos Catalogue and BD 07 953 from the Bonner Durchmusterung catalogue.[1]
Notes
editReferences
edit- ^ a b c d e f g h i j k l m n o p "HD 37320". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2024-05-05.
- ^ a b c d 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.
- ^ a b "University Lowbrow Astronomers Naked Eye Observer's Guide". websites.umich.edu. Retrieved 2024-05-05.
- ^ a b c Brandt, Timothy D. (2021-06-01). "The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition". The Astrophysical Journal Supplement Series. 254 (2): 42. arXiv:2105.11662. Bibcode:2021ApJS..254...42B. doi:10.3847/1538-4365/abf93c. ISSN 0067-0049. Data about this star is available here at VizieR.
- ^ a b "HIP-26487 (Star)". In-the-sky. Retrieved 2024-05-05.
- ^ a b Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (2019-03-01). "Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly". Astronomy and Astrophysics. 623: A72. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371. ISSN 0004-6361. Data about the star is available here at VizieR.
- ^ a b Challouf, M.; Nardetto, N.; Mourard, D.; Graczyk, D.; Aroui, H.; Chesneau, O.; Delaa, O.; Pietrzyński, G.; Gieren, W.; Ligi, R.; Meilland, A.; Perraut, K.; Tallon-Bosc, I.; McAlister, H.; Brummelaar, T. ten (2014-10-01). "Improving the surface brightness-color relation for early-type stars using optical interferometry". Astronomy & Astrophysics. 570: A104. arXiv:1409.1351. Bibcode:2014A&A...570A.104C. doi:10.1051/0004-6361/201423772. ISSN 0004-6361.
- ^ a b c Simón-Díaz, S.; Godart, M.; Castro, N.; Herrero, A.; Aerts, C.; Puls, J.; Telting, J.; Grassitelli, L. (2017-01-01). "The IACOB project . III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars". Astronomy and Astrophysics. 597: A22. arXiv:1608.05508. Bibcode:2017A&A...597A..22S. doi:10.1051/0004-6361/201628541. ISSN 0004-6361. Data about the star is available here at VizieR.
- ^ a b Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002-07-01). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590. ISSN 0004-637X. Available here in VizieR.