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an open source database of all discovered extrasolar planets

HD 7924

The planetary system HD 7924 hosts at least 3 planets.

  System parameters
Primary system name HD 7924
Alternative system names N/A
Right ascension 01 21 59.11491
Declination +76 42 37.0335
Distance [parsec] 16.82±0.13edit
Distance [lightyears] 54.9±0.4
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.

  •  HD 7924, stellar object
    •  HD 7924 b, planet, semi-major axis: 0.0566±0.0007 AU
      •  HD 7924 c, planet, semi-major axis: 0.1134+0.0013−0.0014 AU
        •  HD 7924 d, planet, semi-major axis: 0.1551+0.0018−0.0019 AU

        PlanetsPlanets in the system

        This table lists all planets in the system HD 7924.

          HD 7924 b HD 7924 c HD 7924 d
        Alternative planet names BD+75 58 b, Gliese 9054 b, HIP 6379 b, 2MASS J01215911+76542372 b, PPM 4675 b, TYC 4494-1346-1 b BD+75 58 c, Gliese 9054 c, HIP 6379 c, 2MASS J01215911+76542372 c, PPM 4675 c, TYC 4494-1346-1 c BD+75 58 d, Gliese 9054 d, HIP 6379 d, 2MASS J01215911+76542372 d, PPM 4675 d, TYC 4494-1346-1 d
        Description N/A This super-Earth was discovered by performing joint analysis of high-precision radial velocity data from Keck/HIRES and the new Automated Planet Finder Telescope (APF).edit This super-Earth was discovered by performing joint analysis of high-precision radial velocity data from Keck/HIRES and the new Automated Planet Finder Telescope (APF).edit
        Lists Confirmed planets
        Mass [Mjup] 0.0290±0.0016edit 0.025±0.002edit 0.020±0.003edit
        Mass [Mearth] 9.2±0.5 7.9±0.7 6.5±0.8
        Radius [Rjup] N/A N/A N/A
        Radius [Rearth] N/A N/A N/A
        Orbital period [days] 5.3979±0.0003edit 15.299±0.003edit 24.451+0.015−0.017edit
        Semi-major axis [AU] 0.0566±0.0007edit 0.1134+0.0013−0.0014edit 0.1551+0.0018−0.0019edit
        Eccentricity 0.1700edit 0.1000edit 0.200edit
        Equilibrium temperature [K] 826+7−6edit 584±5edit 499±4edit
        Discovery method RV
        Discovery year 2009 2015 2015
        Last updated [yy/mm/dd] 15/04/24

        starStars in the system

        This table lists all stars in the system HD 7924.

          HD 7924
        Alternative star names BD+75 58, Gliese 9054, HIP 6379, 2MASS J01215911+76542372, PPM 4675, TYC 4494-1346-1
        Mass [MSun] 0.83+0.02−0.04edit
        Radius [RSun] 0.78±0.03edit
        Age [Gyr] N/A
        Metallicity [Fe/H] -0.15±0.03edit
        Temperature [K] 5075±83edit
        Spectral type K0V
        Visual magnitude 7.18edit

        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).

        PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterHD 7924 bHD 7924 cHD 7924 d

        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.

        HD 7924 bHD 7924 cHD 7924 d

        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
        Christian Sturm Sol-d(at) 1
        Hanno Rein hanno(at) 5
        Marc-Antoine Martinod marc-antoine.martinod(at) 1
        Ryan Varley ryanjvarley(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 usefule.


        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.