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an open source database of all discovered extrasolar planets

XO-2

The planetary system XO-2 hosts at least 4 planets. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name XO-2
Alternative system names N/A
Right ascension 07 48 07.479
Declination +50 13 03.25
Distance [parsec] 148±3edit
Distance [lightyears] 483±9
Number of stars in system 2
Number of planets in system 4

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
    •  XO-2S, stellar object
      •  XO-2S b, planet, semi-major axis: 0.134±0.003 AU
        •  XO-2S c, planet, semi-major axis: 0.476±0.009 AU
        •  XO-2N, stellar object
          •  XO-2N b, planet, semi-major axis: 0.0367±0.0006 AU
            •  XO-2N c, planet

          PlanetsPlanets in the system

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

            XO-2S b XO-2S c XO-2N b XO-2N c
          Alternative planet names TYC 3413-210-1 b TYC 3413-210-1 c 2MASS J07480647+5013328 b, TYC 3413-00005-1 b N/A
          Description The planet XO-2S c is part of a multiplanetary system. The host star itself is part of a binary system. The other binary star, XO-2N also hosts a planet. This configuration makes the system a unique laboratory for understanding the diversity of planetary systems.edit The planet XO-2S c is part of a multiplanetary system. The host star itself is part of a binary system. The other binary star, XO-2N also hosts a planet. This configuration makes the system a unique laboratory for understanding the diversity of planetary systems.edit The planet XO-2N b was the first planet discovered in the XO-2 binary. The host star is variable (Zellem et al. 2015) which complicates the analysis of the planetary properties. The stellar variability may be caused by starspots.edit The radial velocity measurements of the star XO-2 exhibit a long-term quadratic trend. This trend correlates with stellar activity indicators so is more likely due to the stellar activity cycle rather than being caused by reflex motion from a planet.edit
          Lists Confirmed planets; Planets in binary systems, S-type Confirmed planets; Planets in binary systems, S-type Confirmed planets; Planets in binary systems, S-type Controversial; Planets in binary systems, S-type
          Mass [Mjup] 0.259±0.014edit 1.37±0.05edit 0.60±0.02edit > 1.8000edit
          Mass [Mearth] 82±4 436±17 190±7 > 572.2096
          Radius [Rjup] N/A N/A 0.973edit N/A
          Radius [Rearth] N/A N/A 10.68 N/A
          Orbital period [days] 18.16±0.03edit 120.8±0.3edit 2.6159±0.0000edit > 6200.0000edit
          Semi-major axis [AU] 0.134±0.003edit 0.476±0.009edit 0.0367±0.0006edit N/A
          Eccentricity 0.18±0.04edit 0.153+0.009−0.010edit < 0.0060edit N/A
          Equilibrium temperature [K] N/A N/A N/A N/A
          Discovery method RV RV transit RV
          Discovery year 2014 2014 2007 2015
          Last updated [yy/mm/dd] 14/07/02 14/07/02 15/05/10 15/05/10

          starStars in the system

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

            XO-2S XO-2N
          Alternative star names XO-2A, TYC 3413-210-1 XO-2B
          Mass [MSun] 0.98±0.05edit 0.97±0.05edit
          Radius [RSun] 1.02+0.09−0.06edit 1.01+0.10−0.07edit
          Age [Gyr] 7+2−3edit 8+2−3edit
          Metallicity [Fe/H] 0.39±0.05edit 0.43±0.05edit
          Temperature [K] 5395±54edit 5332±57edit
          Spectral type K0 K0V
          Visual magnitude N/A 11.18edit

          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).

          PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterXO-2S bXO-2S cXO-2N 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 zoneXO-2S bXO-2S cXO-2N bXO-2N c

          referencesScientific references and contributors

          Links to scientific papers and other data sources

          history http://adsabs.harvard.edu/abs/2015A%26A...575A.111D
          history http://arxiv.org/abs/1505.01063
          history http://cdsbib.u-strasbg.fr/cgi-bin/cdsbib?2003yCat.2246....0C
          history http://adsabs.harvard.edu/abs/2007ApJ...671.2115B
          history http://phl.upr.edu/projects/habitable-exoplanets-catalog/data/database
          history http://arxiv.org/abs/1407.0251
          history http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1407.0251
          history http://arxiv.org/abs/1008.4795

          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)googlemail.com 3
          Hanno Rein hanno(at)hanno-rein.de 5
          Marc-Antoine Martinod marc-antoine.martinod(at)ens-cachan.fr 3
          Ryan Varley ryanjvarley(at)gmail.com 2

          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.