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an open source database of all discovered extrasolar planets

Kepler-446

The planetary system Kepler-446 hosts at least 3 planets.

  System parameters
Primary system name Kepler-446
Alternative system names N/A
Right ascension 18 49 00.051
Declination +44 55 15.99
Distance [parsec] 120.0edit
Distance [lightyears] 391
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.

  •  Kepler-446, stellar object
    •  Kepler-446 b, planet, semi-major axis: 0.067±0.004 AU
      •  Kepler-446 c, planet, semi-major axis: 0.104±0.006 AU
        •  Kepler-446 d, planet, semi-major axis: 0.147±0.010 AU

        PlanetsPlanets in the system

        This table lists all planets in the system Kepler-446.

          Kepler-446 b Kepler-446 c Kepler-446 d
        Alternative planet names KOI-2842 b, KOI-2842.01, KIC 8733898 b, KIC 8733898.01 KOI-2842 c, KOI-2842.03, KIC 8733898 c, KIC 8733898.03 KOI-2842 d, KOI-2842.02, KIC 8733898 d, KIC 8733898.02
        Description Kepler-446 is an M-dwarf with transit signals of three short-period planets.edit Kepler-446 is an M-dwarf with transit signals of three short-period planets.edit Kepler-446 is an M-dwarf with transit signals of three short-period planets.edit
        Lists Confirmed planets
        Mass [Mjup] > 0.0126edit > 0.0063edit > 0.0094edit
        Mass [Mearth] > 4.0001 > 1.9999 > 3.0000
        Radius [Rjup] 0.14±0.02edit 0.101±0.016edit 0.12±0.02edit
        Radius [Rearth] 1.5±0.3 1.11±0.18 1.4±0.2
        Orbital period [days] 1.5654±0.0000edit 3.0362±0.0000edit 5.1489±0.0000edit
        Semi-major axis [AU] 0.067±0.004edit 0.104±0.006edit 0.147±0.010edit
        Eccentricity N/A N/A N/A
        Equilibrium temperature [K] N/A N/A N/A
        Discovery method transit
        Discovery year 2015
        Last updated [yy/mm/dd] 15/01/06

        starStars in the system

        This table lists all stars in the system Kepler-446.

          Kepler-446
        Alternative star names KOI-2842, KIC 8733898
        Mass [MSun] 0.22±0.05edit
        Radius [RSun] 0.24±0.04edit
        Age [Gyr] N/A
        Metallicity [Fe/H] -0.30±0.12edit
        Temperature [K] 3359±60edit
        Spectral type M4
        Visual magnitude 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).

        PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterKepler-446 bKepler-446 cKepler-446 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 zoneKepler-446 bKepler-446 cKepler-446 d

        referencesScientific references and contributors

        Links to scientific papers and other data sources

        history http://arxiv.org/abs/1501.01305

        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)users.noreply.github.com 1
        Hanno Rein hanno(at)hanno-rein.de 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 usefule.

        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.