| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 20h 49m 27.44052s[2] |
| Declination | +33° 36′ 50.9686″[2] |
| Apparent magnitude (V) | 17.8 (estimate)[3] |
| Characteristics | |
| Evolutionary stage | Red dwarf |
| Spectral type | M6.5±0.5[4] |
| Apparent magnitude (B) | 19[5] |
| Apparent magnitude (R) | 16.4[5] |
| Apparent magnitude (G) | 15.379[2] |
| Apparent magnitude (J) | 11.5[6] |
| Apparent magnitude (H) | 10.867±0.021[5] |
| Apparent magnitude (K) | 10.54[6] |
| Astrometry | |
| Proper motion (μ) | RA: –207.809 mas/yr[2] Dec.: –412.215 mas/yr[2] |
| Parallax (π) | 59.7005 ± 0.0434 mas[2] |
| Distance | 54.63 ± 0.04 ly (16.75 ± 0.01 pc)[2] |
| Details[4] | |
| Mass | 0.1009±0.0024 M☉ |
| Radius | 0.123±0.0022 R☉ |
| Luminosity | 0.000835±0.000019 L☉ |
| Surface gravity (log g) | 5.265±0.014 cgs |
| Temperature | 2800±29 K |
| Metallicity [Fe/H] | 0.07±0.1 dex |
| Rotation | 1.34±0.14 d |
| Rotational velocity (v sin i) | 4.8±0.5 km/s |
| Age | 6.6+1.8 −2.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
SPECULOOS-3, also known as LSPM J2049+3336, is a red dwarf star (spectral type M6.5) located 54.6 light-years from Earth[4] in the constellation Cygnus. It is one of the smallest known stars, and is much cooler, dimmer and smaller than the Sun, having 0.1 times the mass, 0.08% the Sun's luminosity, and an effective temperature of 2,800 K (2,530 °C), which is less than half of the Sun's temperature (5,772 K).[4] It is orbited by one known exoplanet, and is the second ultra-cool dwarf discovered to have a planetary system, after TRAPPIST-1.[7][8]
- ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- ^ a b c d e f Cite error: The named reference
DR3was invoked but never defined (see the help page). - ^ Cite error: The named reference
LSPMwas invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
Gillon2024was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Dittmann2014was invoked but never defined (see the help page). - ^ Anderson, Natali (2024-05-15). "Earth-Sized Exoplanet Found Orbiting Nearby Ultracool Red Dwarf". Sci.News. Retrieved 2024-05-28.
- ^ "Detection of an Earth-sized exoplanet orbiting the ultracool dwarf star SPECULOOS-3". ScienceDaily. Retrieved 2024-05-28.