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an open source database of all discovered extrasolar planets

Gliese 436

The planetary system Gliese 436 hosts at least 3 planets.

  System parameters
Primary system name Gliese 436
Alternative system names Gl 436, GJ 436
Right ascension 11 42 11.0932
Declination +26 42 23.6580
Distance [parsec] 9.75±0.03
Distance [lightyears] 31.79±0.09
Number of stars in system 1
Number of planets in system 3

ArchitectureArchitecture of the system

This list shows all planetary and stellar components in the system. It gives a quick overview of the hierarchical architecture.

  •  Gliese 436, stellar object
    •  Gliese 436 b, planet, semi-major axis: 0.029±0.005 AU
      •  UCF-1.01, planet
        •  UCF-1.02, planet

        PlanetsPlanets in the system

        This table lists all planets in the system Gliese 436.

          Gliese 436 b UCF-1.01 UCF-1.02
        Alternative planet names GJ 436 b, Gl 436 b, TYC 1984-2613-1 b, Gaia DR2 4017860992519744384 b, HIP 57087 b N/A N/A
        Description The star Gliese 436 is located in the constellation Leo. Due to tidal forces the planet Gliese 436b is expected to circularise on short timescales. It might be perturbed by an additional planet in the system. The star Gliese 436 is located in the constellation Leo. While observing the already known planet Gliese 436 b with the Spitzer Space Telescope, astronomers identified two sub-Earth sized candidates, UCF-1.01 and UCF-1.02. Follow-up observations by Stevenson et al. (2014) failed to find the planet. The planet candidate UCF-1.02 was identified based on the detection of two possible transits separated by 151 days. This is insufficient to determine an orbital period, and the candidate has not been confirmed.
        Lists Confirmed planets Controversial Controversial
        Mass [Mjup] 0.080+0.007−0.006 N/A N/A
        Mass [Mearth] 25.4+2.1−2.0 N/A N/A
        Radius [Rjup] 0.361±0.015 0.059±0.004 0.058±0.005
        Radius [Rearth] 4.05±0.17 0.66±0.04 0.65±0.06
        Orbital period [days] 2.6439±0.0000 1.3659±0.0000 N/A
        Semi-major axis [AU] 0.029±0.005 N/A N/A
        Eccentricity 0.162±0.004 N/A N/A
        Equilibrium temperature [K] N/A N/A N/A
        Discovery method transit
        Discovery year 2004 2012 2012
        Last updated [yy/mm/dd] 17/12/22

        starStars in the system

        This table lists all stars in the system Gliese 436.

          Gliese 436
        Alternative star names Gl 436, GJ 436, HIP 57087, TYC 1984-2613-1, Ross 905, LHS 310, 2MASS J11421096+2642251, Gaia DR2 4017860992519744384
        Mass [MSun] 0.45±0.04
        Radius [RSun] 0.449±0.019
        Age [Gyr] > 4.0000
        Metallicity [Fe/H] -0.320
        Temperature [K] 3479±60
        Spectral type M3V
        Visual magnitude 10.590+0.009−0.011

        Planet sizes

        The following plot shows the approximate sizes of the planets in this system The Solar System planets are shown as a comparison. Note that unless the radius has been determined through a transit observation, this is only an approximation (see Lissauer et al. 2011b).

        PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterGliese 436 bUCF-1.01UCF-1.02

        Habitable zone

        The following plot shows the approximate location of the planets in this system with respect to the habitable zone (green) and the size of the star (red). This is only an estimate, using the star's spectral type and mass. Note that if no green band is shown in the plot, then the planet's orbit is far outside the habitable zone. The equations of Selsis, Kasting et al are used to draw the inner and outer boundaries.

        Habitable zoneGliese 436 bUCF-1.01UCF-1.02

        referencesScientific references and contributors

        Links to scientific papers and other data sources


        This table lists all links which are relevant to this particular system. Note that this is just a summary. More references to the scientific publications and comments can be found in the commit messages. To see these, head over the github or click here to directly go to the git blame output of this system. In the left column of the output you can see the commit message corresponding to each parameter. It also lists the date of the last commit and the person making the changes. Within the commit message, you will find a link to the scientific publication where the data is taken from. Note that this is a new feature and not all system parameters might have a reference associated with it yet. Please help making this catalogue better and contribute data or references!

        Open Exoplanet Catalogue contributors

        Contributor E-mail Number of commits
        Andrew Tribick ajtribick(at) 1
        Hanno Rein hanno(at) 11
        Jaroslav Merc jaroslav.merc(at) 1
        Marc-Antoine Martinod marc-antoine.martinod(at) 7
        Ryan Varley ryanjvarley(at) 2

        This table lists all people who have contributed to the Open Exoplanet Catalogue. Please consider contributing! Click here to find out how. You can also view all commits contributing to this file on github.

        xmlData download

        You can download the xml file corresponding to this planetary system, which is part of the Open Exoplanet Catalogue. All information on this page has been directly generated from this XML file. You can also download the entire catalogue over at github. If you prefer to download the dataset as an ASCII tables, you might find the oec_tables repository useful.


        If you spot an error or if you can contribute additional data to this entry, please send an e-mail to Please include the corrected xml file and a reference to where the new data is coming from, ideally a scientific paper. If you are fluent with git and github, you can also create a pull request or open an issue on the Open Exoplanet Catalogue repository. Please include the reference to the relevant scientific paper in your commit message.