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an open source database of all discovered extrasolar planets

YZ Cet

The planetary system YZ Cet hosts at least 3 planets.

  System parameters
Primary system name YZ Cet
Alternative system names HIP 5643
Right ascension 01 12 30.6367
Declination -16 59 56.3613
Distance [parsec] 3.60
Distance [lightyears] 11.74
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.

  •  YZ Cet, stellar object
    •  YZ Cet b, planet, semi-major axis: 0.0156±0.0005 AU
      •  YZ Cet c, planet, semi-major axis: 0.0209±0.0007 AU
        •  YZ Cet d, planet, semi-major axis: 0.0276±0.0009 AU

        PlanetsPlanets in the system

        This table lists all planets in the system YZ Cet.

          YZ Cet b YZ Cet c YZ Cet d
        Alternative planet names HIP 5643 b, Gaia DR2 2358524597030794112 b, TYC 5851-171-1 b, GJ 54.1 b HIP 5643 c HIP 5643 d
        Description This planet was discovered by Astudillo-Defru et al. 2017. This was a ground based discovery. The parameters listed here are those reported by Astudillo-Defru et al. 2017 and were imported into the Open Exoplanet Catalogue from the NASA Exoplanet Archive.
        Lists Confirmed planets
        Mass [Mjup] 0.0024±0.0004 0.0031±0.0004 0.0036±0.0005
        Mass [Mearth] 0.75±0.13 0.98±0.14 1.14±0.17
        Radius [Rjup] N/A N/A N/A
        Radius [Rearth] N/A N/A N/A
        Orbital period [days] 1.9688±0.0002 3.0601±0.0002 4.6563±0.0004
        Semi-major axis [AU] 0.0156±0.0005 0.0209±0.0007 0.0276±0.0009
        Eccentricity 0.00±0.12 0.04±0.11 0.13±0.10
        Equilibrium temperature [K] N/A N/A N/A
        Discovery method RV
        Discovery year 2017
        Last updated [yy/mm/dd] 17/08/24

        starStars in the system

        This table lists all stars in the system YZ Cet.

          YZ Cet
        Alternative star names HIP 5643, Gaia DR2 2358524597030794112, TYC 5851-171-1, GJ 54.1
        Mass [MSun] 0.130±0.010
        Radius [RSun] 0.170±0.010
        Age [Gyr] N/A
        Metallicity [Fe/H] -0.26±0.08
        Temperature [K] 3056±60
        Spectral type M4.5
        Visual magnitude 12.07

        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).

        PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterYZ Cet bYZ Cet cYZ Cet 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.

        Habitable zoneYZ Cet bYZ Cet cYZ Cet d

        referencesScientific references and contributors

        Links to scientific papers and other data sources

        No links found.

        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
        Hanno Rein hanno(at)hanno-rein.de 4

        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.

        correctionsCorrections

        If you spot an error or if you can contribute additional data to this entry, please send an e-mail to exoplanet@hanno-rein.de. 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.