| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Telescopium[1] |
| Right ascension | 20h 27m 42.08140s[2] |
| Declination | −56° 27′ 25.1519″[2] |
| Apparent magnitude (V) | 12.193[3] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | M2.5V[4] |
| Apparent magnitude (B) | 13.655±0.029[3] |
| Apparent magnitude (V) | 12.193±0.056[3] |
| Apparent magnitude (G) | 11.235±0.003[2] |
| Apparent magnitude (J) | 8.697±0.019[3] |
| Apparent magnitude (H) | 8.161±0.034[3] |
| Apparent magnitude (K) | 7.915±0.023[3] |
| Astrometry | |
| Radial velocity (Rv) | 7.38±0.29[2] km/s |
| Proper motion (μ) | RA: 424.417 mas/yr[2] Dec.: −1,230.941 mas/yr[2] |
| Parallax (π) | 49.0555 ± 0.0247 mas[2] |
| Distance | 66.49 ± 0.03 ly (20.39 ± 0.01 pc) |
| Details[3] | |
| Mass | 0.381±0.019 M☉ |
| Radius | 0.391±0.020 R☉ |
| Luminosity (bolometric) | 0.0196+0.0026 −0.0023 L☉ |
| Surface gravity (log g) | 4.49[2] cgs |
| Temperature | 3,458+140 −133 K |
| Metallicity [Fe/H] | 0.1±0.1 dex |
| Age | 3.9±0.4[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
GJ 1252 is a red dwarf star located 66.5 light-years (20.4 parsecs) away from the Solar System in the constellation of Telescopium. The star has about 38% the mass and 39% the radius of the Sun, and a temperature of about 3,458 K (3,185 °C; 5,765 °F). GJ 1252 is orbited by one known exoplanet.[3]
Planetary system
[edit]
GJ 1252 was found to have a planet, GJ 1252 b, in 2019 using transit observations from TESS.[3] It is a terrestrial planet larger than Earth, with about 1.3 times the mass and 1.18 times the radius of Earth. Orbiting its star with a very short period of just 12.4 hours, it is presumably tidally locked. Secondary eclipse observations have shown that GJ 1252 b lacks a significant atmosphere, similar to LHS 3844 b and TRAPPIST-1b, and have measured its dayside temperature at about 1,410 K (1,140 °C; 2,080 °F).[5][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.32±0.28 M🜨 | 0.00915±0.00015 | 0.51824160 | — | 84.8±3.2° | 1.180±0.078 R🜨 |
References
[edit]- ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e f g h i Shporer, Avi; Collins, Karen A.; et al. (February 2020). "GJ 1252 b: A 1.2 R⊕ Planet Transiting an M3 Dwarf at 20.4 pc". The Astrophysical Journal Letters. 890 (1): L7. arXiv:1912.05556. Bibcode:2020ApJ...890L...7S. doi:10.3847/2041-8213/ab7020.
- ^ Reid, I. Neill; et al. (October 1995). "The Palomar/MSU Nearby-Star Spectroscopic Survey. I. The Northern M Dwarfs -Bandstrengths and Kinematics". Astronomical Journal. 110: 1838. Bibcode:1995AJ....110.1838R. doi:10.1086/117655.
- ^ a b c Crossfield, Ian J. M.; Malik, Matej; et al. (September 2022). "GJ 1252b: A Hot Terrestrial Super-Earth with No Atmosphere". The Astrophysical Journal Letters. 937 (1): L17. arXiv:2208.09479. Bibcode:2022ApJ...937L..17C. doi:10.3847/2041-8213/ac886b.
- ^ "GJ 1252". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 May 2023.
- ^ a b Gohd, Chelsea (11 October 2022). "Discovery Alert: Ultra-hot 'Super-Earth' Could Have No Atmosphere". NASA. Retrieved 8 May 2023.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction