User:Trurle/HD 95338
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 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 mas[1] |
| 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 |
HD 95338 is a single orange (K-type) main-sequence or subgiant star, located approximately 124 light-years away in the constellation of Draco, taking its primary name from its Henry Draper Catalogue designation.
History and nomenclature
[edit]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
[edit]HD 95338 is a Sun-like K-type main-sequence star. It belongs to thick disk of Milky Way.[3] It is likely same age or slightly older than the Sun and have metallicity similar to solar.
Planetary system
[edit]In 2020, an radial-velocity analysis carried out by a team of astronomers led by astronomer Matías R. Díaz of the Magellan Planet Search Program have detected a Neptune-sized ice giant planet in orbit around HD 95338. The discovery was confirmed with the detection of primary star transit by 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
[edit]References
[edit]- ^ a b c d e f g HD 95338, entry, SIMBAD. Accessed online March 24, 2020.
- ^ a b c d 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.
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