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an open source database of all discovered extrasolar planets

Gliese 777

The planetary system Gliese 777 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 777
Alternative system names N/A
Right ascension 20 03 37.405
Declination +29 53 48.50
Distance [parsec] 15.89
Distance [lightyears] 51.8
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
    •  Gliese 777 A, stellar object
      •  Gliese 777 A b, planet, semi-major axis: 3.92 AU
        •  Gliese 777 A c, planet, semi-major axis: 0.1280 AU
        •  Gliese 777 B, stellar object

        PlanetsPlanets in the system

        This table lists all planets in the system Gliese 777.

          Gliese 777 A b Gliese 777 A c
        Alternative planet names HD 190360 A b, HD 190360 b, HR 7670 A b HD 190360 A c, HD 190360 c, HR 7670 A c
        Description The A component of the star system Gliese 777 hosts at least two planets. With 6.7 billion years, the host star is much older than our Sun. The binary companion is a dim red dwarf orbiting at a distance of 3000 astronomical units.
        Lists Confirmed planets; Planets in binary systems, S-type
        Mass [Mjup] 1.50+1.15−0.15 0.064±0.010
        Mass [Mearth] 475+367−49 20±3
        Radius [Rjup] N/A N/A
        Radius [Rearth] N/A N/A
        Orbital period [days] 2868±8 17.1186±0.0016
        Semi-major axis [AU] 3.92 0.1280
        Eccentricity 0.343±0.017 0.11±0.07
        Equilibrium temperature [K] N/A N/A
        Discovery method RV
        Discovery year 2003 2005
        Last updated [yy/mm/dd] 15/06/29

        starStars in the system

        This table lists all stars in the system Gliese 777.

          Gliese 777 A Gliese 777 B
        Alternative star names HD 190360 A, HR 7670 A HD 190360 B, HR 7670 B
        Mass [MSun] 1.040 0.200
        Radius [RSun] 1.200 N/A
        Age [Gyr] 6.70 N/A
        Metallicity [Fe/H] 0.240 N/A
        Temperature [K] N/A N/A
        Spectral type G6 IV M4.5
        Visual magnitude 5.71 N/A

        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 777 A bGliese 777 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 zoneGliese 777 A bGliese 777 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) 2
        Christian Sturm Sol-d(at) 1
        Hanno Rein hanno(at) 5
        Marc-Antoine Martinod marc-antoine.martinod(at) 1

        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.