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tau Ceti

The planetary system tau Ceti hosts at least 7 planets.

  System parameters
Primary system name tau Ceti
Alternative system names HD 10700
Right ascension 01 44 04.08338
Declination -15 56 14.9262
Distance [parsec] 3.650±0.002edit
Distance [lightyears] 11.905±0.008
Number of stars in system 1
Number of planets in system 7

ImageImage

 

Artist's impression of the Tau Ceti system Picture credit: J. Pinfield for the RoPACS network at the University of Hertfordshire, 2012.

ArchitectureArchitecture of the system

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

  •  tau Ceti, stellar object
    •  tau Ceti b, planet, semi-major axis: 0.105+0.005−0.006 AU
      •  tau Ceti c, planet, semi-major axis: 0.195+0.009−0.011 AU
        •  tau Ceti d, planet, semi-major axis: 0.374+0.017−0.020 AU
          •  tau Ceti e, planet, semi-major axis: 0.538±0.006 AU
            •  tau Ceti f, planet, semi-major axis: 1.334+0.017−0.044 AU
              •  tau Ceti g, planet
                •  tau Ceti h, planet, semi-major axis: 0.243±0.003 AU

                PlanetsPlanets in the system

                This table lists all planets in the system tau Ceti.

                  tau Ceti b tau Ceti c tau Ceti d tau Ceti e tau Ceti f tau Ceti g tau Ceti h
                Alternative planet names HD 10700 b HD 10700 c HD 10700 d HD 10700 e HD 10700 f HD 10700 g HD 10700 h
                Description Multiple periodic signals were found by Tuomi et al. in 2012 in the radial velocity data from HARPS, AAPS and HIRES. The planetary nature of the signals has yet to be confirmed.edit Multiple periodic signals were found by Tuomi et al. in 2012 in the radial velocity data from HARPS, AAPS and HIRES. The planetary nature of the signals has yet to be confirmed.edit Multiple periodic signals were found by Tuomi et al. in 2012 in the radial velocity data from HARPS, AAPS and HIRES. The planetary nature of the signals has yet to be confirmed.edit Multiple periodic signals were found by Tuomi et al. in 2012 in the radial velocity data from HARPS, AAPS and HIRES. The planetary nature of the signals has yet to be confirmed.edit Multiple periodic signals were found by Tuomi et al. in 2012 in the radial velocity data from HARPS, AAPS and HIRES. The planetary nature of the signals has yet to be confirmed.edit Analysis of the Tau Ceti RV data taking into account wavelength-dependent noise indicated a four planet system around the star. Two of the previously-detected planets (e and f) were confirmed, while two new planets were found, designated g and h to avoid confusion with the previous candidates.edit Analysis of the Tau Ceti RV data taking into account wavelength-dependent noise indicated a four planet system around the star. Two of the previously-detected planets (e and f) were confirmed, while two new planets were found, designated g and h to avoid confusion with the previous candidates.edit
                Lists Retracted planet candidate Retracted planet candidate Retracted planet candidate Confirmed planets Confirmed planets Confirmed planets Confirmed planets
                Mass [Mjup] 0.006±0.003edit 0.010+0.004−0.003edit 0.011±0.005edit 0.012+0.003−0.002edit 0.012+0.003−0.004edit 0.0055+0.0008−0.0013edit 0.0058+0.0021−0.0008edit
                Mass [Mearth] 2.0±0.8 3.1+1.4−1.1 3.6±1.7 3.9+0.8−0.6 3.9+1.0−1.4 1.8+0.3−0.4 1.8+0.7−0.3
                Radius [Rjup] N/A N/A N/A N/A N/A N/A N/A
                Radius [Rearth] N/A N/A N/A N/A N/A N/A N/A
                Orbital period [days] 13.965+0.017−0.023edit 35.36+0.09−0.11edit 94.1+0.7−0.6edit 162.9+1.1−0.5edit 636+12−48edit 20.000+0.020−0.010edit 49.41+0.08−0.10edit
                Semi-major axis [AU] 0.105+0.005−0.006edit 0.195+0.009−0.011edit 0.374+0.017−0.020edit 0.538±0.006edit 1.334+0.017−0.044edit N/A 0.243±0.003edit
                Eccentricity 0.16+0.22−0.16edit 0.03+0.28−0.03edit 0.08+0.26−0.08edit 0.18+0.18−0.14edit 0.16+0.07−0.16edit 0.06+0.13−0.06edit 0.23+0.16−0.15edit
                Equilibrium temperature [K] N/A N/A N/A N/A N/A N/A N/A
                Discovery method RV
                Discovery year 2012 2012 2012 2012 2012 2017 2017
                Last updated [yy/mm/dd] 17/11/28

                starStars in the system

                This table lists all stars in the system tau Ceti.

                  tau Ceti
                Alternative star names tau Cet, τ Cet, HD 10700, 52 Cet, 52 Ceti, HIP 8102, TYC 5855-2292-1, Gliese 71, Gliese 71.0, Gl 71, Gl 71.0, GJ 71, GJ 71.0, HR 509, BD-16 205, SAO 147986, 2MASS J01440402-1556141, LHS 146
                Mass [MSun] 0.783±0.012edit
                Radius [RSun] 0.793±0.004edit
                Age [Gyr] 5.80edit
                Metallicity [Fe/H] -0.55±0.05edit
                Temperature [K] 5344±50edit
                Spectral type G8.5 V
                Visual magnitude 3.50edit

                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).

                PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupitertau Ceti btau Ceti ctau Ceti dtau Ceti etau Ceti ftau Ceti gtau Ceti h

                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 zonetau Ceti btau Ceti ctau Ceti dtau Ceti etau Ceti ftau Ceti gtau Ceti h

                referencesScientific references and contributors

                Links to scientific papers and other data sources

                history http://star-www.herts.ac.uk/~hraj/tauceti/
                history https://ui.adsabs.harvard.edu/?#abs/2017AJ....154..135F
                history https://www.aanda.org/articles/aa/abs/2013/03/aa20509-12/aa20509-12.html
                history http://arxiv.org/pdf/1212.4277v1.pdf

                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 1
                Hanno Rein hanno(at)hanno-rein.de 5
                Marc-Antoine Martinod marc-antoine.martinod(at)ens-cachan.fr 1
                Ryan Varley ryanjvarley(at)gmail.com 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.

                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.