 | This is not a Wikipedia article: It is an individual user's work-in-progress page, and may be incomplete and/or unreliable. For guidance on developing this draft, see Wikipedia:So you made a userspace draft. Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
 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
editThe 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
editHD 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
editIn 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
editReferences
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.
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| Star clusters |
| ||||||||||
| Nebulae |
| ||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
