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an open source database of all discovered extrasolar planets

BD+20 2457

The planetary system BD+20 2457 hosts at least 2 planets.

  System parameters
Primary system name BD+20 2457
Alternative system names BD20 2457
Right ascension 10 16 44.8635
Declination +19 53 28.974
Distance [parsec] N/A
Distance [lightyears] N/A
Number of stars in system 1
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.

  •  BD+20 2457, stellar object
    •  BD+20 2457 b, planet, semi-major axis: 1.450 AU
      •  BD+20 2457 c, planet, semi-major axis: 2.01 AU

      PlanetsPlanets in the system

      This table lists all planets in the system BD+20 2457.

        BD+20 2457 b BD+20 2457 c
      Alternative planet names BD20 2457 b BD20 2457 c
      Description The star BD+20 2457 is located in the constellation Leo. Its metallicity is ten times lower compared to our Sun. The orbital parameters given in the discovery paper have been shown to be dynamically unstable on astronomically short timescales.edit The star BD+20 2457 is located in the constellation Leo. Its metallicity is ten times lower compared to our Sun. The orbital parameters given in the discovery paper have been shown to be dynamically unstable on astronomically short timescales.edit
      Lists Controversial
      Mass [Mjup] 21.4edit 12.47edit
      Mass [Mearth] 6809 3964
      Radius [Rjup] N/A N/A
      Radius [Rearth] N/A N/A
      Orbital period [days] 380±2edit 622±10edit
      Semi-major axis [AU] 1.450edit 2.01edit
      Eccentricity 0.15±0.03edit 0.18±0.06edit
      Equilibrium temperature [K] N/A N/A
      Discovery method RV
      Discovery year 2009
      Last updated [yy/mm/dd] 15/11/26

      starStars in the system

      This table lists all stars in the system BD+20 2457.

        BD+20 2457
      Alternative star names BD20 2457, TYC 1422-790-1, 2MASS J10164485+1953290
      Mass [MSun] 2.8±1.5edit
      Radius [RSun] N/A
      Age [Gyr] N/A
      Metallicity [Fe/H] -1.00±0.07edit
      Temperature [K] 4137±10edit
      Spectral type K2II
      Visual magnitude 9.74±0.03edit

      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).

      PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterBD+20 2457 bBD+20 2457 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.

      BD+20 2457 bBD+20 2457 c

      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
      Ewan Douglas douglase(at)bu.edu 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 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.