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an open source database of all discovered extrasolar planets

PTFO 8-8695

The planetary system PTFO 8-8695 hosts at least 2 planets.

  System parameters
Primary system name PTFO 8-8695
Alternative system names CVSO 30
Right ascension 05 25 07.557
Declination +01 34 24.33
Distance [parsec] 330edit
Distance [lightyears] 1076
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.

  •  PTFO 8-8695, stellar object
    •  PTFO 8-8695 b, planet, semi-major axis: 0.0080 AU
      •  CVSO 30 c, planet

      PlanetsPlanets in the system

      This table lists all planets in the system PTFO 8-8695.

        PTFO 8-8695 b CVSO 30 c
      Alternative planet names 2MASS J05250755+0134243 b, CVSO 30 b PTFO 8-8695 c
      Description PTFO 8-8695 b is a Jupiter-sized candidate planet orbiting a T Tauri star. The orbit is rapidly precessing, causing it to stop transiting during part of its orbital evolution. According to Onitsuka et al. (2017), the observations are better explained by a circumstellar dust clump or the occultation of an accretion hotspot.edit CVSO 30 c is a directly imaged candidate companion to the star PTFO 8-8695. It is not yet confirmed whether it is co-moving with the star.edit
      Lists Controversial
      Mass [Mjup] < 3.0000edit 5+4−2edit
      Mass [Mearth] < 953.4852 1494+1144−636
      Radius [Rjup] 1.9±0.2edit 1.6+0.9−0.3edit
      Radius [Rearth] 21±2 18+10−4
      Orbital period [days] 0.4484±0.0000edit N/A
      Semi-major axis [AU] 0.0080edit N/A
      Eccentricity N/A N/A
      Equilibrium temperature [K] N/A 1600+120−300edit
      Discovery method transit imaging
      Discovery year 2012 2016
      Last updated [yy/mm/dd] 17/11/28

      starStars in the system

      This table lists all stars in the system PTFO 8-8695.

        PTFO 8-8695
      Alternative star names 2MASS J05250755+0134243, CVSO 30
      Mass [MSun] 0.340edit
      Radius [RSun] 1.07±0.10edit
      Age [Gyr] 0.0027edit
      Metallicity [Fe/H] N/A
      Temperature [K] 3470edit
      Spectral type M3
      Visual magnitude 16.26edit

      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).

      PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterPTFO 8-8695 bCVSO 30 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.

      Habitable zonePTFO 8-8695 bCVSO 30 c

      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) 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.