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an open source database of all discovered extrasolar planets

Gliese 15

The planetary system Gliese 15 hosts at least 2 planets. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name Gliese 15
Alternative system names N/A
Right ascension 00 18 22.88532
Declination +44 01 22.6282
Distance [parsec] 3.587±0.010
Distance [lightyears] 11.70±0.03
Number of stars in system 2
Number of planets in system 2

ArchitectureArchitecture of the system

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

  •  Stellar binary, semi-major axis: 96±13 AU, 1253±259 years
    •  Gliese 15 A, stellar object
      •  GJ 15 A b, planet, semi-major axis: 0.072+0.003−0.004 AU
        •  GJ 15 A c, planet, semi-major axis: 5.4+1.0−0.9 AU
        •  Gliese 15 B, stellar object

        PlanetsPlanets in the system

        This table lists all planets in the system Gliese 15.

          GJ 15 A b GJ 15 A c
        Alternative planet names HD 1326 A b, HIP 1475 b HD 1326 A c, HIP 1475 c
        Description This planet was discovered by Howard et al. 2014. This was a ground based discovery. The parameters listed here are those reported by Pinamonti et al. 2018 and were imported into the Open Exoplanet Catalogue from the NASA Exoplanet Archive. This planet was discovered by Pinamonti et al. 2018. This was a ground based discovery. The parameters listed here are those reported by Pinamonti et al. 2018 and were imported into the Open Exoplanet Catalogue from the NASA Exoplanet Archive.
        Lists Confirmed planets; Planets in binary systems, S-type
        Mass [Mjup] 0.0095±0.0014 0.11+0.08−0.06
        Mass [Mearth] 3.0+0.5−0.4 36+25−18
        Radius [Rjup] N/A N/A
        Radius [Rearth] N/A N/A
        Orbital period [days] 11.4407+0.0017−0.0016 7600+2200−1700
        Semi-major axis [AU] 0.072+0.003−0.004 5.4+1.0−0.9
        Eccentricity 0.09+0.09−0.07 0.27+0.28−0.19
        Equilibrium temperature [K] N/A N/A
        Discovery method RV
        Discovery year 2014 2018
        Last updated [yy/mm/dd] 19/10/10

        starStars in the system

        This table lists all stars in the system Gliese 15.

          Gliese 15 A Gliese 15 B
        Alternative star names GJ 15 A, HD 1326 A, HIP 1475, TYC 2794-157-1, SAO 36248, GX Andromedae, GX And, Groombridge 34 A, BD+43 44 A, WDS J00184+4401 A, 2MASS J00182256+4401222 GJ 15 B, HD 1326 B, GQ And, GQ Andromedae, Groombridge 34 B, BD+43 44 B, WDS J00184+4401 B, 2MASS J00182549+4401376
        Mass [MSun] 0.38±0.06 0.1630
        Radius [RSun] 0.386±0.002 0.1900
        Age [Gyr] N/A N/A
        Metallicity [Fe/H] -0.32±0.17 N/A
        Temperature [K] 3567±11 N/A
        Spectral type M2V M3.5
        Visual magnitude 8.130±0.010 11.04

        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).

        PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterGJ 15 A bGJ 15 A c

        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 zoneGJ 15 A bGJ 15 A c

        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) 3
        Christian Sturm Sol-d(at) 1
        Hanno Rein hanno(at) 3

        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.