Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Indus [1] |
Right ascension | 22h 41m 58.11718s [2] |
Declination | −69° 10′ 08.3207″ [2] |
Apparent magnitude (V) | 15.26±0.03 [3] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | M4.5-M5 [3] |
Apparent magnitude (V) | 15.26±0.03 [3] |
Apparent magnitude (G) | 13.365±0.003 [2] |
Apparent magnitude (J) | 10.046±0.023 [3] |
Apparent magnitude (H) | 9.477±0.023 [3] |
Apparent magnitude (K) | 9.145±0.023 [3] |
Astrometry | |
Radial velocity (Rv) | −9.90±0.76 [2] km/s |
Proper motion (μ) | RA: 334.419 mas/yr [2] Dec.: −726.986 mas/yr [2] |
Parallax (π) | 67.2123 ± 0.0187 mas [2] |
Distance | 48.53 ± 0.01 ly (14.878 ± 0.004 pc) |
Absolute magnitude (MV) | 14.39±0.02 [3] |
Details [3] | |
Mass | 0.151±0.014 M☉ |
Radius | 0.189±0.006 R☉ |
Luminosity (bolometric) | 0.00272±0.0004 L☉ |
Surface gravity (log g) | 5.06±0.01 cgs |
Temperature | 3036±77 K |
Rotation | 128±24 d |
Age | 7.8±1.6 [4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
LHS 3844 is a red dwarf star located 48.5 light-years (14.9 parsecs ) away from the Solar System in the constellation of Indus. The star has about 15% the mass and 19% the radius of the Sun. [3] It is a relatively inactive red dwarf with a slow rotation period of about 128 days, though UV flares have been observed. [6] LHS 3844 is orbited by one known exoplanet.
The designation LHS 3844 comes from one of Luyten's catalogues of stars with high proper motion.
In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [7] The approved names, proposed by a team from Costa Rica, were announced in June 2023. LHS 3844 is named Batsũ̀ and its planet is named Kua'kua, after the Bribri words for "hummingbird" and "butterfly". [8]
The exoplanet LHS 3844 b was discovered in 2018 using TESS. [3] It is a terrestrial planet larger than Earth with an orbital period of less than a day, and likely does not have an atmosphere. Its low albedo suggests that its surface may resemble that of the Moon or Mercury. [9] [10]
Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Kua'kua | ~2.25 M🜨 | 0.00622±0.00017 | 0.46292913±0.0000019 | — | 88.50±0.51 ° | 1.303±0.022 R🜨 |
HD 118203 is a star located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem Staburags un Liesma. The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU.
WASP-19b, formally named Banksia, is an exoplanet, notable for possessing one of the shortest orbital periods of any known planetary body: 0.7888399 days or approximately 18.932 hours. It has a mass close to that of Jupiter, but by comparison has a much larger radius ; making it nearly the size of a low-mass star. It orbits the star WASP-19 in the Vela constellation. At the time of discovery it was the shortest period hot Jupiter discovered as planets with shorter orbital periods had a rocky, or metallic composition.
GJ 1214 is a dim M4.5 red dwarf star in the constellation Ophiuchus with an apparent magnitude of 14.7. It is located at a distance of 47.8 light-years from Earth. GJ 1214 hosts one known exoplanet.
GJ 3470 b is an exoplanet orbiting the star GJ 3470, located in the constellation Cancer. With a mass of just under 14 Earth-masses and a radius approximately 4.3 times that of Earth's, it is likely something akin to Neptune despite the initially strong belief that the planet was not covered in clouds like the gas giants in the Solar System.
LHS 1140 is a red dwarf in the constellation of Cetus. Based on stellar parallax measurement, it is 48.8 light-years away from the Sun. 'LHS' refers to the Luyten Half-Second Catalogue of stars with proper motions exceeding half a second of arc annually. The star is over 5 billion years old and has only about 18% the mass of the Sun and 21% of its radius. LHS 1140's rotational period is 130 days. No flares have been observed.
LHS 3844 b, formally named Kua'kua, is an exoplanet orbiting the red dwarf LHS 3844, about 48.5 light-years away in the constellation Indus, discovered using the Transiting Exoplanet Survey Satellite. It orbits its parent star once every 11 hours, and its radius is 1.32 times that of Earth. It has a low albedo, indicating that its surface may resemble that of the Moon or Mercury. LHS 3844 b probably does not have an atmosphere as almost no heat goes to its night side, and it has a dayside temperature of 1,040 K. The presence of cloudy atmosphere with cloud tops above pressure level of 0.1 bar cannot be excluded though.
TOI-700 is a red dwarf 101.4 light-years away from Earth located in the Dorado constellation that hosts TOI-700 d, the first Earth-sized exoplanet in the habitable zone discovered by the Transiting Exoplanet Survey Satellite (TESS).
LTT 1445 is a triple M-dwarf system 22.4 light-years distant in the constellation Eridanus. The primary LTT 1445 A hosts two exoplanets—one discovered in 2019 that transits the star every 5.36 days, and another found in 2021 that transits the star every 3.12 days, close to a 12:7 resonance. As of August 2019 it is the second closest transiting exoplanet system discovered, with the closest being HD 219134 bc.
GJ 3470 is a red dwarf star located in the constellation of Cancer, 96 light-years away from Earth. With a faint apparent magnitude of 12.3, it is not visible to the naked eye. It hosts one known exoplanet.
WASP-63 or Kosjenka, also known as CD-38 2551, is a single star with an exoplanetary companion in the southern constellation of Columba. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 11.1. The distance to this system is approximately 942 light-years based on parallax measurements, but it is drifting closer with a radial velocity of −24 km/s.
WASP-69, also named Wouri, is a K-type main-sequence star 164 light-years away. Its surface temperature is 4782±15 K. WASP-69 is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.10±0.01, and is much younger than the Sun at 2 billion years. The data regarding starspot activity of WASP-69 are inconclusive, but spot coverage of the photosphere may be very high.
Gliese 486, also known as Wolf 437 and formally named Gar, is a red dwarf star 26.4 light-years away in the constellation Virgo. It hosts one known exoplanet.
L 98-59 is a bright M dwarf star, located in the constellation of Volans, at a distance of 10.608 parsecs, as measured by Gaia.
Gliese 367 is a red dwarf star 30.7 light-years from Earth in the constellation of Vela. It is suspected to be a variable with amplitude 0.012 stellar magnitude and period 5.16 years. A stellar multiplicity survey in 2015 failed to detect any stellar companions to Gliese 367. It hosts three known exoplanets, Gliese 367 b, c & d.
LTT 9779 is a G-type main-sequence star located 264 light-years away from the Solar System in the constellation of Sculptor. The star is about 95% the radius and about the same mass as the Sun, but younger than the Sun at 1.7 billion years old, hence its lower luminosity. It has a temperature of 5,443 K and a rotation period of 45 days. LTT 9779 is orbited by one known exoplanet.
L 168-9 is a red dwarf star located 82.1 light-years away from the Solar System in the constellation of Tucana. The star has about 62% the mass and 60% the radius of the Sun. It has a temperature of 3,800 K and a rotation period of 29.8 days. L 168-9 is orbited by one known exoplanet.
GJ 1252 is a red dwarf star located 66.5 light-years 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. GJ 1252 is orbited by one known exoplanet.