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The planetary system CFHTWIR-Oph 98 A hosts at least one planet.

  System parameters
Primary system name CFHTWIR-Oph 98 A
Alternative system names N/A
Right ascension 16 27 44
Declination -23 58 52
Distance [parsec] 137±4
Distance [lightyears] 447±13
Number of stars in system 1
Number of planets in system 1



Images of the Oph 98 binary system from the first epoch of CFHT data (left), HST observations (middle) and UKIRT data (right). North is up and East is left. Image credit: Fontanive et al. 2020.

ArchitectureArchitecture of the system

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

  •  CFHTWIR-Oph 98 A, stellar object
    •  CFHTWIR-Oph 98 A b, planet, semi-major axis: 200±6 AU

    PlanetsPlanets in the system

    This table lists all planets in the system CFHTWIR-Oph 98 A.

      CFHTWIR-Oph 98 A b
    Alternative planet names N/A
    Description This planet was discovered by Fontanive et al. 2020. It is a planetary-mass companion to CFHTWIR-Oph 98, a low-mass brown dwarf member of the young Ophiuchus star-forming region. The low component masses and very large separation make this binary the lowest binding energy system imaged to date, indicating that the outcome of low-mass star formation can result in such extreme, weakly-bound systems. The discovery was made with the 2.4 m Hubble Space Telescope.
    Lists Confirmed planets
    Mass [Mjup] 7.8+0.7−0.8
    Mass [Mearth] 2479+222−254
    Radius [Rjup] 1.86±0.05
    Radius [Rearth] 20.8±0.6
    Orbital period [days] ( 8.0±0.5 )·106
    Semi-major axis [AU] 200±6
    Eccentricity N/A
    Equilibrium temperature [K] 1800±40
    Discovery method imaging
    Discovery year 2020
    Last updated [yy/mm/dd] 21/06/13

    starStars in the system

    This table lists all stars in the system CFHTWIR-Oph 98 A.

      CFHTWIR-Oph 98 A
    Alternative star names Oph 98 A
    Mass [MSun] 0.0100
    Radius [RSun] 0.240±0.010
    Age [Gyr] N/A
    Metallicity [Fe/H] N/A
    Temperature [K] 2320±40
    Spectral type M9-L1
    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).

    PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterCFHTWIR-Oph 98 A 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 zoneCFHTWIR-Oph 98 A 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
    Hanno Rein hanno(at) 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 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.