TVLM 513-46546
Red/brown dwarf star in the constellation Boötes / From Wikipedia, the free encyclopedia
TVLM 513-46546 is an M9 ultracool dwarf at the red dwarf/brown dwarf mass boundary in the constellation Boötes. It exhibits flare star activity, which is most pronounced at radio wavelengths. The star has a mass approximately 80 times the mass of Jupiter (or 8 percent of the Sun's mass). The radio emission is broadband and highly circularly polarized, similar to planetary auroral radio emissions.[5] The radio emission is periodic, with bursts emitted every 7054 s, with nearly one hundredth of a second precision. Subtle variations in the radio pulses could suggest that the ultracool dwarf rotates faster at the equator than the poles (differential rotation) in a manner similar to the Sun.[6]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Boötes |
Right ascension | 15h 01m 08.18646s[1] |
Declination | +22° 50′ 02.1379″[1] |
Apparent magnitude (V) | 15.09[2] |
Characteristics | |
Spectral type | M9[3] |
Astrometry | |
Proper motion (μ) | RA: −43.120±0.111 mas/yr[1] Dec.: −65.138±0.140 mas/yr[1] |
Parallax (π) | 93.1655 ± 0.1355 mas[1] |
Distance | 35.01 ± 0.05 ly (10.73 ± 0.02 pc) |
Details | |
Mass | 0.09 M☉ |
Radius | 0.11 R☉ |
Luminosity | 0.00042 L☉ |
Temperature | 2,500 K |
Age | >1 billion years |
Other designations | |
Database references | |
SIMBAD | data |
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