NSV 2863, BD−21°1377, GJ 229, HD 42581, HIP 29295, SAO 171334, LHS 1827, TYC 5945-765-1
Database references
SIMBAD
A
B
Gliese 229
Location of Gliese 229 in the constellation Lepus
Gliese 229 (also written as Gl 229 or GJ 229) is a binary system composed of a red dwarf and the first brown dwarf seen by astronomers, 18.8 light years away in the constellation Lepus. The primary component has 58% of the mass of the Sun,[3] 69% of the Sun's radius,[6] and a very low projected rotation velocity of 1 km/s at the stellar equator.[8]
The star is known to be a low activity flare star, which means it undergoes random increases in luminosity because of magnetic activity at the surface. The spectrum shows emission lines of calcium in the H and K bands. The emission of X-rays has been detected from the corona of this star.[10] These may be caused by magnetic loops interacting with the gas of the star's outer atmosphere. No large-scale star spot activity has been detected.[2]
The space velocity components of this star are U = +12, V = –11 and W = –12 km/s.[11] The orbit of this star through the Milky Way galaxy has an eccentricity of 0.07 and an orbital inclination of 0.005.[2]
^ abcdeCite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
^ abcdeCite error: The named reference mnras214 was invoked but never defined (see the help page).
^ abcdeCite error: The named reference Brandt2021 was invoked but never defined (see the help page).
^ abCite error: The named reference Morales+2008 was invoked but never defined (see the help page).
^ abCite error: The named reference Feng2022 was invoked but never defined (see the help page).
^ abCite error: The named reference apjss71 was invoked but never defined (see the help page).
^Cite error: The named reference DíezAlonso2019 was invoked but never defined (see the help page).
^ abCite error: The named reference aaa467 was invoked but never defined (see the help page).
^ abcCite error: The named reference Howe2022 was invoked but never defined (see the help page).
^Cite error: The named reference Schmitt was invoked but never defined (see the help page).
^Cite error: The named reference Gliese1969 was invoked but never defined (see the help page).
Cite error: There are <ref group=nb> tags on this page, but the references will not show without a {{reflist|group=nb}} template (see the help page).
Gliese229 (also written as Gl 229 or GJ 229) is a binary system composed of a red dwarf and the first brown dwarf seen by astronomers, 18.8 light years...
Golimowski. It was confirmed in 1995 as a substellar companion to Gliese229. Gliese 229b is one of the first two instances of clear evidence for a brown...
Gliese 445 (Gl 445 or AC +79 3888) is an M-type main sequence star in the northern part of the constellation Camelopardalis. It is currently 17.1 light-years...
artifacts of stellar activity. These include Gliese 581 d & g, Gliese 667 Ce & f, Gliese 682 b & c, Kapteyn b, and Gliese 832 c. HD 85512 b was initially estimated...
Gliese 570 (or 33 G. Librae) is a quaternary star system approximately 19 light-years away. The primary star is an orange dwarf star (much dimmer and smaller...
Gliese 876 is a red dwarf star 15.2 light-years (4.7 parsecs) away from Earth in the constellation of Aquarius. It is one of the closest known stars to...
encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. It is currently predicted...
Ross 248, also called HH Andromedae or Gliese 905, is a small star approximately 10.30 light-years (3.16 parsecs) from Earth in the northern constellation...
sent on July 1, 1999, and it will arrive at Gliese 777 in April 2051. 47 Ursae Majoris 51 Pegasi Gliese229 van Leeuwen, F. (2007). "Validation of the...
Gliese 581 (/ˈɡliːzə/) is a red dwarf star of spectral type M3V at the center of the Gliese 581 planetary system, about 20.5 light years away from Earth...
1998 for a planet orbiting around Gliese 876 (15.3 light-years (ly) away), and the latest as of 2023 are two around Gliese 367 (30.7 ly). The closest exoplanets...
Gliese 832 (Gl 832 or GJ 832) is a red dwarf of spectral type M2V in the southern constellation Grus. The apparent visual magnitude of 8.66 means that...
extrasolar planet HD 209458 b has a mass of 0.69 MJ, while the brown dwarf Gliese229 b has a mass of 60.4 MJ. Theoretical models indicate that if Jupiter had...
Gliese 1 is a red dwarf in the constellation Sculptor, which is found in the southern celestial hemisphere. It is one of the closest stars to the Sun,...
Gliese 504 b (often shortened to GJ 504 b) is a Jovian planet or brown dwarf located in the system of the solar analog 59 Virginis (GJ 504), discovered...
Teide 1 in 1995. The first brown dwarf discovered orbiting a star was Gliese229 B, also discovered in 1995. The first brown dwarf found to have a planet...
WO107 (501647) 2014 SD224 2020 XL5 Exoplanets AU Mic b Gliese229 Ac Gliese 414 Ab Ac Gliese 433 b c d GJ 1151 b radio emissions K2-315b Kepler-1649c...