HD 215152
HD 215152 is the Henry Draper Catalogue designation for a star in the zodiac constellation of Aquarius. It has an apparent visual magnitude of 8.13, meaning it is too faint to be seen with the naked eye. Parallax measurements provide distance estimates of around 70 light years. The star has a relatively high proper motion, moving across the sky at an estimated 0.328 arc seconds per year along a position angle of 205°.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 43m 21.3028s |
| Declination | −06° 24′ 02.953″ |
| Apparent magnitude (V) | 8.13 |
| Characteristics | |
| Spectral type | K3 V |
| B−V color index | 0.968 |
| Astrometry | |
| Radial velocity (Rv) | −13.80 km/s |
| Proper motion (μ) | RA: −154.095 mas/yr Dec.: −289.915 mas/yr |
| Parallax (π) | 46.3324 ± 0.0238 mas |
| Distance | 70.39 ± 0.04 ly (21.58 ± 0.01 pc) |
| Details | |
| Mass | 0.756±0.016 M☉ |
| Surface gravity (log g) | 4.26±0.15 cgs |
| Temperature | 4,803±52 K |
| Metallicity [Fe/H] | −0.08±0.02 dex |
| Rotation | 36.5±1.6 d |
| Rotational velocity (v sin i) | 3.35 km/s |
| Age | 5.207±4.069 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
A 2015 survey ruled out the existence of any additional stellar companions at projected distances from 6 to 145 astronomical units.
This star has a stellar classification of K3 V, which indicates that it is an ordinary K-type main sequence star. Based upon observation of regular variations in chromospheric activity, it has a rotation period of 36.5±1.6 days. Stellar models give an estimated mass of around 76% of the Sun. It has a slightly lower metallicity than the Sun, and thus has a lower abundance of elements other than hydrogen and helium. The effective temperature of the stellar atmosphere is about 4,803 K, giving it the orange-hued glow of an ordinary K-type star.
HD 215152 is a candidate for possessing a debris disk—a circumstellar disk of orbiting dust and debris. This finding was made through the detection of an infrared excess at a wavelength of 70 μm by the Spitzer Space Telescope. The detection has a 3σ level of certainty.