Size comparison of Gliese 581d with Earth and Neptune.
(Based on selected hypothetical modeled compositions)
Discovery[1]
Discovered by
Udry et al.
Discovery site
La Silla Observatory, Chile
Discovery date
24 April 2007
Detection method
Radial velocity
Orbital characteristics[2]
Semi-major axis
0.21847 ± 0.00028 AU (32,683,000 ± 42,000 km)[3]
Eccentricity
0.205±0.08
Orbital period (sidereal)
66.64±0.08 d
Time of periastron
245141.6407±4.19 JD
Argument of periastron
2°±23°
Semi-amplitude
2.20±0.19 m/s
Star
Gliese 581
Physical characteristics
Mass
≥5.6±0.6 M🜨[3]
Gliese 581d/ˈɡliːzə/ (often shortened to Gl 581d or GJ 581d) is a doubtful, and frequently disputed, exoplanet candidate orbiting within the Gliese 581 system, approximately 20.4 light-years away in the Libra constellation. It was the third planet claimed in the system and the fourth (in a 4-planet model) or fifth (in a disproven 5- or 6-planet model) in order from the star. Multiple subsequent studies found that the planetary signal in fact originates from stellar activity, and thus the planet does not exist,[4][5][6][7] but this remains disputed.[8]
Though significantly more massive than Earth (at a minimum mass of 6.98 Earth masses), this super-Earth was the first exoplanet of relatively low mass regarded as orbiting within the habitable zone of its parent star. Assuming its existence, computer climate simulations have confirmed the possibility of the existence of surface water and these factors combine to a relatively high measure of planetary habitability.[9][10]
^Cite error: The named reference Udry was invoked but never defined (see the help page).
^Cite error: The named reference Hatzes2013 was invoked but never defined (see the help page).
^ abCite error: The named reference Vogt was invoked but never defined (see the help page).
^Cite error: The named reference SCI-20140703 was invoked but never defined (see the help page).
^Cite error: The named reference Hatzes2016 was invoked but never defined (see the help page).
^Cite error: The named reference Trifonov2018 was invoked but never defined (see the help page).
^Cite error: The named reference Dodson-Robinson2022 was invoked but never defined (see the help page).
^Cite error: The named reference Cuntz2024 was invoked but never defined (see the help page).
^Cite error: The named reference Bloh was invoked but never defined (see the help page).
^Cite error: The named reference Selsis2007 was invoked but never defined (see the help page).
Gliese581d /ˈɡliːzə/ (often shortened to Gl 581d or GJ 581d) is a doubtful, and frequently disputed, exoplanet candidate orbiting within the Gliese 581...
resulted in the detection of two more planets, Gliese 581c and Gliese581d. The orbital period of Gliese581d was originally thought to be 83 days but was...
suggested planet Gliese581d really could exist, despite stellar variability, and the 2014 refutation of the existence of Gliese581d and g was triggered...
billion Gya): Formation of the Gliese 581 planetary system: Gliese 581c, the first observed ocean planet and Gliese581d, a super-Earth planet, possibly...
the system, Gliese581d, with a minimum mass of 7.7 Earth masses and a semi-major axis of 0.25 astronomical units. The existence of Gliese 581c and its...
planet discovered in the system (fourth if the disputed planet candidate Gliese581d is included) and the first in order from the star. The planet was discovered...
Gliese 581b or Gl 581b is an exoplanet orbiting within the Gliese 581 system. It is the first planet discovered of three confirmed in the system so far...
Orcus and Vanth Gliese 581c, Gliese 581g, Gliese 581b, and Gliese 581e may be tidally locked to their parent star Gliese 581. Gliese581d is almost certainly...
orbits very close to the star. Two others, Gliese 581c and the disputed Gliese581d, are more-massive super-Earths orbiting in or close to the habitable...
5 times that of Earth (R🜨). Since then Gliese581d, which is also potentially habitable, was discovered. Gliese 581c and d are within the habitable zone...
(AMFE) was sent toward the Gliese 581 planetary system, which contains two potentially habitable planets, the confirmed Gliese581d and the more habitable...
Bibcode:2003AsBio...3..415J. doi:10.1089/153110703769016488. PMID 14577888. "Gliese581d". Astroprof’s Page. 16 June 2007. Archived from the original on 29 October...
The Doctor and Bill arrive on one of Earth's first colonised planets, Gliese581d. They are greeted only by two different types of robots: swarm robots...
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 412 is a pair of stars that share a common proper motion through space and are thought to form a binary star system. The pair have an angular separation...
Archived 2012-01-27 at the Wayback Machine (D-Wave) 12 May – The exoplanet Gliese581d can be considered the first confirmed exoplanet that could potentially...
"Periodic Hα variations in GL 581: Further evidence for an activity origin to GL 581d". Astronomy & Astrophysics. 585: A144. arXiv:1512.00878. Bibcode:2016A&A...
atmosphere. Gliese581d is about 20 light-years away from Earth in the constellation Libra; this planet might harbor "alien life." Its red star Gliese 581 generates...
send messages from the public, each just 160 characters in length, to Gliese581d, the nearest Earth-like planet outside the Solar System. Created as a...
surface. The Gliese 581 planetary system contains multiple planets that may be candidates for surface water, including Gliese 581c, Gliese581d, might be...
messages which were beamed to the first Earth like planet candidate, Gliese581d. In 2016 it included Wikibomb2016, a project to create missing Wikipedia...
9.4 times the mass of Jupiter); the least massive confirmed planet is Gliese 581 e, which masses 0.007906 MJ or 2.51 M🜨. The longest period of any confirmed...
(b, c and d). The nearest system with four or more confirmed planets is Gliese 876, with four known.[citation needed] The farthest confirmed multiplanetary...
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