Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canis Major [1] |
Right ascension | 07h 16m 14.55266s [2] |
Declination | −15° 35′ 08.4862″ [2] |
Apparent magnitude (V) | 5.45 [3] |
Characteristics | |
Evolutionary stage | main sequence [2] [4] |
Spectral type | A1V [5] |
B−V color index | 0.079±0.005 [1] |
Astrometry | |
Radial velocity (Rv) | +6.30±0.9 [6] km/s |
Proper motion (μ) | RA: −45.415 [2] mas/yr Dec.: −14.578 [2] mas/yr |
Parallax (π) | 12.9537±0.0714 mas [2] |
Distance | 252 ± 1 ly (77.2 ± 0.4 pc) |
Absolute magnitude (MV) | 0.88 [1] |
Details | |
Mass | 2.13 [7] M☉ |
Radius | 2.47 [8] R☉ |
Luminosity | 38.86 [1] L☉ |
Surface gravity (log g) | 4.14±0.14 [7] cgs |
Temperature | 9,562±325 [7] K |
Rotational velocity (v sin i) | 149 [7] km/s |
Age | 212 [7] Myr |
Other designations | |
BD−15°1734, FK5 2561, GC 9657, GJ 9228, HD 56405, HIP 35180, HR 2758, SAO 152641, TYC 5965-363-1 [9] | |
Database references | |
SIMBAD | data |
HD 56405 is a star in the southern constellation of Canis Major. It is white in hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.45. [3] To the east of HD 56405 is the open cluster NGC 2360, also known as Caroline's Cluster. [10] The distance to HD 56405, as determined from parallax measurements, is approximately 252 light years. It is drifting further away with a radial velocity (RV) of about +6 km/s. [6] Although classed as a single star, [11] it is to suspected to vary in RV. [12]
This is an A-type main-sequence star with a stellar classification of A1V. [5] It was classed as a candidate Lambda Boötis star, [13] but as of 2015 this classification has been rejected by astronomers due to the star having an inconsistent UV flux, possible RV variability, and a fairly high rotation rate. [3] The star is about 212 million years old with 2.13 times the mass of the Sun and is spinning with a projected rotational velocity of 149 km/s. [7] It is radiating 39 [1] times the luminosity of the Sun from its photosphere at an effective temperature of around 9,562 K. [7]