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HU Aqr

The planetary system HU Aqr hosts at least 3 planets. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name HU Aqr
Alternative system names N/A
Right ascension 21 07 58
Declination -05 17 41
Distance [parsec] N/A
Distance [lightyears] N/A
Number of stars in system 2
Number of planets in system 3

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, 0.0024±0.0000 years
    •  HU Aqr A, stellar object
      •  HU Aqr B, stellar object
        •  HU Aqr (AB) b, circumbinary planet, P-type, semi-major axis: 3.60 AU
          •  HU Aqr (AB) c, circumbinary planet, P-type, semi-major axis: 6.56 AU
            •  HU Aqr (AB) d, circumbinary planet, P-type, semi-major axis: 12.89 AU

            PlanetsPlanets in the system

            This table lists all planets in the system HU Aqr.

              HU Aqr (AB) b HU Aqr (AB) c HU Aqr (AB) d
            Alternative planet names N/A N/A N/A
            Description The eclipse timing data for HU Aquarii does not allow for any stable coplanar 2-planet systems and is not sufficient to uniquely constrain a stable 3-planet system. The data given here are for a stable coplanar 3-planet system where the middle planet orbits in a retrograde direction. The eclipse timing variations may be due to the Applegate mechanism rather than reflex motion due to circumbinary planets: the luminosity variations associated with this mechanism may be smoothed out by the long thermal timescale of the stellar convection zone.edit The eclipse timing data for HU Aquarii does not allow for any stable coplanar 2-planet systems and is not sufficient to uniquely constrain a stable 3-planet system. The data given here are for a stable coplanar 3-planet system where the middle planet orbits in a retrograde direction. The eclipse timing variations may be due to the Applegate mechanism rather than reflex motion due to circumbinary planets: the luminosity variations associated with this mechanism may be smoothed out by the long thermal timescale of the stellar convection zone.edit The eclipse timing data for HU Aquarii does not allow for any stable coplanar 2-planet systems and is not sufficient to uniquely constrain a stable 3-planet system. The data given here are for a stable coplanar 3-planet system where the middle planet orbits in a retrograde direction. The eclipse timing variations may be due to the Applegate mechanism rather than reflex motion due to circumbinary planets: the luminosity variations associated with this mechanism may be smoothed out by the long thermal timescale of the stellar convection zone.edit
            Lists Controversial; Planets in binary systems, P-type
            Mass [Mjup] 4.76edit 20.2edit 80.0edit
            Mass [Mearth] 1513 6421 25432
            Radius [Rjup] N/A N/A N/A
            Radius [Rearth] N/A N/A N/A
            Orbital period [days] N/A N/A N/A
            Semi-major axis [AU] 3.60edit 6.56edit 12.89edit
            Eccentricity 0.0218edit 0.1365edit 0.0158edit
            Equilibrium temperature [K] N/A N/A N/A
            Discovery method timing
            Discovery year 2011 2011 2014
            Last updated [yy/mm/dd] 15/05/24

            starStars in the system

            This table lists all stars in the system HU Aqr.

              HU Aqr A HU Aqr B
            Alternative star names N/A N/A
            Mass [MSun] 0.800edit 0.18±0.06edit
            Radius [RSun] N/A N/A
            Age [Gyr] N/A N/A
            Metallicity [Fe/H] N/A N/A
            Temperature [K] N/A N/A
            Spectral type WD M4V
            Visual magnitude N/A 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).

            PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterHU Aqr (AB) bHU Aqr (AB) cHU Aqr (AB) d

            referencesScientific references and contributors

            Links to scientific papers and other data sources

            history http://adsabs.harvard.edu/abs/2015MNRAS.448.1118G
            history http://adsabs.harvard.edu/abs/2011A%26A...531A..34S

            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

            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.