06h40m01.727s, −48° 32′ 31.04″| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 06h40m 01.7270s[1] |
| Declination | −48° 32′ 31.042″[1] |
| Apparent magnitude (V) | 8.07[2] |
| Characteristics | |
| Spectral type | G5IV/V[3] |
| Apparent magnitude (B) | ~8.80[2] |
| Apparent magnitude (J) | 6.842 ± 0.021[4] |
| Apparent magnitude (H) | 6.529 ± 0.061[4] |
| Apparent magnitude (K) | 6.449 ± 0.020[4] |
| Astrometry | |
| Radial velocity (Rv) | 22.5 ± 0.2[5] km/s |
| Proper motion (μ) | RA: 26.524±0.089[1] mas/yr Dec.: 29.689±0.095[1] mas/yr |
| Parallax (π) | 11.14 ± 0.21 mas[1] |
| Distance | 293 ± 6 ly (90 ± 2 pc) |
| Absolute magnitude (MV) | 3.34[6] |
| Details | |
| Mass | 0.93[6] M☉ |
| Radius | 2.34 ± 0.26[7] R☉ |
| Luminosity | 0.623 ± 0.058[7] L☉ |
| Temperature | 5,508[5] K |
| Metallicity [Fe/H] | 0.29 ± 0.05[2] dex |
| Rotational velocity (v sin i) | 3.0[7] km/s |
| Age | 4.8[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 48265 is the Henry Draper Catalogue designation for a star in the southern constellation Puppis. It has an apparent visual magnitude of 8.07,[2] which makes it too faint to be seen with the naked eye. Based upon parallax measurements made during the Hipparcos mission, it is located at a distance of roughly 293 light-years (90parsecs) from Earth.[1]
This star has a stellar classification of G5IV/V,[3] suggesting that, at an age of 4.8 billion years,[5] it has reached an intermediate evolutionary stage between a main sequence star and a subgiant. It has but 93% of the mass of the Sun,[6] while its outer atmosphere has begun to expand, reaching about 2.3 times the Sun's radius.[7] HD 48265 is radiating 62%[7] of the Sun's luminosity from its atmosphere at an effective temperature of 5,508 K,[5] giving it the cool orange glow of a K-type star.[9] Measurement of the chemical abundances of this star indicate that, compared to the Sun, it has a 95%[2] greater proportion of elements other than hydrogen and helium—what astronomers term the star's metallicity.
In October 2008 the planet, HD 48265 b, was reported to be orbiting this star. This object was detected using the radial velocity method during an astronomical survey conducted by the Magellan Planet Search Program using the MIKE echelle spectrograph on the 6.5-m Magellan II (Clay) telescope.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Naqaỹa | ≥1.47±0.12 MJ | 1.81±0.07 | 780.3±4.6 | 0.08±0.05 | — | — |
As part of the NameExoWorlds project of the IAU, HD 48265 b has been named Naqaỹa ("brother") and HD 48265 Nosaxa ("springtime") in the Moqoit language, as voted by Argentine voters in an online poll.[11][12]
