HD 95338
 Location of HD 95338 in the night sky. The star is marked within the red diamond. | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Vela |
| Right ascension | 10h 59m 26.3037630802s[1] |
| Declination | −56° 37′ 22.947260490″[1] |
| Apparent magnitude (V) | 8.62[1] |
| Characteristics | |
| HD 95338 | |
| Evolutionary stage | main-sequence star |
| Spectral type | K0.5V[2] |
| Astrometry | |
| Radial velocity (Rv) | +96.609 ± 0.005[1] km/s |
| Proper motion (μ) | RA: -416.88 [1] mas/yr Dec.: -119.71 [1] mas/yr |
| Parallax (π) | 27.0025 ± 0.005[1] mas |
| Distance | 120.79 ± 0.02 ly (37.034 ± 0.007 pc) |
| Absolute magnitude (MV) | 5.72 |
| Details | |
| HD 95338 | |
| Mass | 0.76 M☉ |
| Radius | 0.86[2] R☉ |
| Luminosity (visual, LV) | 0.49 L☉ |
| Surface gravity (log g) | 4.54 cgs |
| Temperature | 5212 K |
| Metallicity [Fe/H] | 0.04 dex |
| Age | 5.08±2.51 Gyr |
| Other designations | |
HIP 53719, LTT 4041, TYC 8623-1270-1, 2MASS J10592629-5637229, Gaia DR2 5340648488081462528 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 95338 is a single orange (K-type) main-sequence or subgiant star, located approximately 124 light-years away in the constellation of Vela, taking its primary name from its Henry Draper Catalogue designation.
History and nomenclature
The designation HD 95338 is from the Henry Draper Catalogue, which is based on spectral classifications made between 1911 and 1915 by Annie Jump Cannon and her co-workers, and was published between 1918 and 1924.
Characteristics
HD 95338 is a Sun-like K-type main-sequence star. It belongs to the thick disk of the Milky Way.[3] It is likely the same age or slightly older than the Sun and has metallicity similar to solar.
Planetary system
In 2020, a radial-velocity analysis carried out by a team of astronomers led by astronomer Matías R. Díaz of the Magellan Planet Search Program detected a Neptune-sized ice giant planet in orbit around HD 95338. The discovery was confirmed with the detection of the primary star's transit by the Transiting Exoplanet Survey Satellite.
The planet HD 95338 b has an unusually high density for its mass, likely being composed mostly of water ice.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 39.43+6.04 −4.13 M⊕ |
0.231 +0.005 −0.009 |
55.086 +0.018 −0.019 |
0.199+0.025 −0.024 |
89.35° | 3.98+0.09 −0.08 R⊕ |
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 HD 95338, entry, SIMBAD. Accessed online March 24, 2020.
- ↑ 2.0 2.1 2.2 2.3 Díaz, Matías R.; Jenkins, James S.; Feng, Fabo; Paul Butler, R.; Tuomi, Mikko; Shectman, Stephen A.; Thorngren, Daniel; Soto, Maritza G.; Vines, José I.; Teske, Johanna K.; Dragomir, Diana; Villanueva, Steven; Kane, Stephen R.; Berdiñas, Zaira M.; Crane, Jeffrey D.; Wang, Sharon X.; Arriagada, Pamela (2020). "The Magellan/PFS Exoplanet Search: A 55-day period dense Neptune transiting the bright ($V=8.6$) star HD 95338". arXiv:2003.10319 [astro-ph.EP].
- ↑ Trevisan, M.; Barbuy, B.; Eriksson, K. (November 2011). "Analysis of old very metal-rich stars in the solar neighbourhood" (PDF). Astronomy & Astrophysics. 535: A42. arXiv:1109.6304. Bibcode:2011A&A...535A..42T. doi:10.1051/0004-6361/201016056. Retrieved 25 March 2020.
Coordinates: 
10h 59m 26.3037630802s, −56° 37′ 22.947260490″
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