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The planetary system KELT-2 hosts at least one planet. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name KELT-2
Alternative system names KELT-2 A
Right ascension 06 10 39.35
Declination +30 57 25.7
Distance [parsec] 129+5−4edit
Distance [lightyears] 419+17−14
Number of stars in system 2
Number of planets in system 1

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
    •  KELT-2A, stellar object
      •  KELT-2A b, planet, semi-major axis: 0.0550±0.0009 AU
      •  KELT-2B, stellar object

      PlanetsPlanets in the system

      This table lists all planets in the system KELT-2.

        KELT-2A b
      Alternative planet names HIP 29301 A b, WDS J06107+3057 A b, TYC 2420-00899-1 A b, HD 42176 A b, BD+30 1138 A b, SAO 58830 A b, 2MASS J06103935+3057258 b
      Description This planet is a typical Hot Jupiter. It is the first planet discovered by the Kilodegree Extremely Little Telescope-North (KELT-North) survey. KELT-2A is the third brightest star with a transiting planet identified by ground-based transit surveys, and the ninth brightest star overall with a transiting planet. The planet might have been put on its orbit by the binary companion KELT-2B via the so-called eccentric Kozai mechanism.edit
      Lists Confirmed planets; Planets in binary systems, S-type
      Mass [Mjup] 1.52±0.09edit
      Mass [Mearth] 484±28
      Radius [Rjup] 1.29+0.06−0.05edit
      Radius [Rearth] 14.5+0.7−0.6
      Orbital period [days] 4.1138±0.0000edit
      Semi-major axis [AU] 0.0550±0.0009edit
      Eccentricity 0.00edit
      Equilibrium temperature [K] 1712+28−20edit
      Discovery method transit
      Discovery year 2012
      Last updated [yy/mm/dd] 15/09/20

      starStars in the system

      This table lists all stars in the system KELT-2.

        KELT-2A KELT-2B
      Alternative star names WDS J06107+3057 A, HIP 29301 A, TYC 2420-899-1 A, HD 47126 A, BD+30 1138 A, SAO 58830 A, COU 1102 A WDS J06107+3057 B, HIP 29301 B, TYC 2420-899-1 B, HD 47126 B, BD+30 1138 B, SAO 58830 B, COU 1102 B
      Mass [MSun] 1.31±0.06edit 0.780edit
      Radius [RSun] 1.84+0.07−0.05edit 0.700edit
      Age [Gyr] N/A N/A
      Metallicity [Fe/H] -0.03±0.78edit N/A
      Temperature [K] 6148±48edit 485±150edit
      Spectral type F7V K2V
      Visual magnitude 8.77±0.02edit 12.00edit

      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).

      PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterKELT-2A b

      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.

      KELT-2A b

      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) 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.