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an open source database of all discovered extrasolar planets


The planetary system PH-2 hosts at least one planet.

  System parameters
Primary system name PH-2
Alternative system names KIC 12735740, Kepler-86, KOI-3663
Right ascension 19 19 03
Declination +51 57 45.36
Distance [parsec] 370
Distance [lightyears] 1206
Number of stars in system 1
Number of planets in system 1



Artistic rendition of a sunset view from the perspective of an imagined Earth-like moon orbiting the giant planet, PH2 b. Image Credit: H. Giguere, M. Giguere/Yale University

ArchitectureArchitecture of the system

This list shows all planetary and stellar components in the system. It gives a quick overview of the hierarchical architecture.

  •  PH-2, stellar object
    •  PH-2 b, planet, semi-major axis: 0.828 AU

    PlanetsPlanets in the system

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

      PH-2 b
    Alternative planet names KOI-3663.01, KOI-3663 b, KIC 12735740 b, 2MASS 19190326+5157453 b, Planet Hunters 2 b, Kepler-86 b
    Description The exoplanet PH-2 b was discovered by citizen scientists using an online tool at The planet is a gas giant and could be located in the star's habitable zone. The system might also have a faint binary companion.
    Lists Confirmed planets
    Mass [Mjup] < 80.0000
    Mass [Mearth] < 25426.2728
    Radius [Rjup] 0.90±0.05
    Radius [Rearth] 10.1±0.6
    Orbital period [days] 283
    Semi-major axis [AU] 0.828
    Eccentricity 0.410
    Equilibrium temperature [K] 281
    Discovery method transit
    Discovery year 2013
    Last updated [yy/mm/dd] 15/12/03

    starStars in the system

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

    Alternative star names Kepler-86, KOI-3663, KIC 12735740, 2MASS 19190326+5157453, 2MASS J19190326+5157453
    Mass [MSun] 0.94±0.02
    Radius [RSun] 1.00±0.05
    Age [Gyr] N/A
    Metallicity [Fe/H] -0.08±0.03
    Temperature [K] 5629+42−45
    Spectral type N/A
    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).

    PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterPH-2 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.

    Habitable zonePH-2 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) 3
    Hanno Rein hanno(at) 7
    Jaroslav Merc jaroslav.merc(at) 1
    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 useful.


    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.