It 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.[7] Its uniform disk angular diameter is measured at 0.153 milliarcseconds.[6] 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☉[5] and rotates under its own axis at a speed of 25 km/s.[8]
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.[3] 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.[9] The absolute magnitude of HD 37320, i.e. its brightness if it was seen at 10 parsecs (32.6 ly), is -1.43.[4] It is moving away from Earth at a velocity of 20.1 km/s.[2]
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]
