SSSPM J0829-1309
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 08h 28m 34.1713208171s[1] |
| Declination | −13° 09′ 19.842042734″[1] |
| Characteristics | |
| Spectral type | L2[1][2][3] |
| Apparent magnitude (J) | 12.80±0.03[4] |
| Astrometry | |
| Proper motion (μ) | RA: −581.562 mas/yr Dec.: 27.538[1] mas/yr |
| Parallax (π) | 87.96±0.78[5] mas |
| Distance | 38.1 ly |
| Details | |
| Mass | 0.06[6] M☉ |
| Mass | 62.85431[6] MJup |
| Radius | 0.088±0.003[5] R☉ |
| Radius | 118000 km |
| Luminosity | 0.00014 L☉ |
| Temperature | 2117±37[5] K |
| Other designations | |
2MASS J08283419-1309198, V484 Hydrae, DENIS J082834.3-130919, TIC 926898, V* V484 Hya, WISEA J082833.75-130919.5, EQ J0829-1309, Gaia EDR3 5723739672264914176 [6] | |
SSSPM J0829-1309, also known as 2MASS J08283419-1309198 or V484 Hydrae, is a very-low-mass red dwarf[5] or high-mass brown dwarf[1] in the constellation of Hydra, about 38.1 light-years distant from the Solar System. It was discovered during the systematic investigation of self-movements on the basis of the data from the SuperCOSMOS Sky Surveys (the findings were published in 2002).[4] Having a dim J-Band apparent magnitude of only 12.80,[4] SSSPM J0829-0139 is visible primarily in large telescopes sensitive to infrared light.
Characteristics[edit]
At around 118,000 kilometres in diameter,[7] the diameter of this star is only 8.8% of the Sun's diameter (and smaller than that of Jupiter’s), and it is almost 10,000 times dimmer than the Sun.[5] The temperature of SSSPM J0829-0139 is approximately 2,117 K (1843.85˚C, 3350.93˚F), and it has a spectral type of L2.[1][2][6]
Hydrogen Burning Limit[edit]
The relationships between radius and temperature and radius on luminosity have a local minimum that separates the main sequence of stars that fuse hydrogen into helium from young and high-mass brown dwarfs that are incapable of doing so. The star SSSPM J0829-1309 is close to this minimum and is only slightly brighter than the similar object 2MASS J0523-1403.[5] Along with 2MASS J0523-1403, this is one of the smallest objects known that is capable of fusing hydrogen.[5]
Distance[edit]
SSSPM J0829-0139 is 38.1 light years (around 11.7 parsecs) distant from the Sun. The nearest star to it is the G-type star HD 69830, which has three exoplanets and is located 3.4 light years away from SSSPM J0829-0139.[6] No exoplanets have been discovered around SSSPM J0829-0139 so far.[6] The red dwarfs UPM J0815-2344, Gliese 3459 and Ross 440 are also within 11 light years of SSSPM J0829-0139.[6]
See Also[edit]
- 2MASS J0523-1403 - Another L-type star with similar characteristics.
- EBLM J0555-57 - Another very small red dwarf.
- OGLE-TR-122 - This binary stellar system contained one of the smallest red dwarfs known when it was discovered.
- OGLE-TR-123 - Binary stellar system with a small red dwarf.
- LHS 2924
- List of smallest stars
References[edit]
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "SIMBAD query result: SSSPM J0829-0139". SIMBAD - Centre de données astronomiques de Strasbourg.
- ↑ 2.0 2.1 "SSSPM J0829-1309: A New nearby L dwarf detected in superCOSMOS Sky Surveys". inspirehep.net. Retrieved November 21, 2021.
- ↑ "L2V standards".
- ↑ 4.0 4.1 4.2 "physik.cosmos-indirekt.de" (in Deutsch).
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 Dieterich, Sergio B.; Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Hosey, Altonio D.; Riedel, Adric R.; Subasavage, John P. (May 2014). "The Solar Neighborhood. Xxxii. The Hydrogen Burning Limit". The Astronomical Journal. 147 (5): 94. arXiv:1312.1736. doi:10.1088/0004-6256/147/5/94. Unknown parameter
|s2cid=ignored (help) - ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 "Living Future: SSSPM J0829-0139". livingfuture.cz. Retrieved November 21, 2021.
- ↑ "Space Deck Expert Mode".
This article "SSSPM J0829-1309" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:SSSPM J0829-1309. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
