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an open source database of all discovered extrasolar planets

Kepler-444

The planetary system Kepler-444 hosts at least 5 planets. Note that the system is a multiple star system. It hosts at least 3 stellar components.

  System parameters
Primary system name Kepler-444
Alternative system names N/A
Right ascension 19 19 00.54910
Declination +41 38 04.5682
Distance [parsec] 35.7±1.1edit
Distance [lightyears] 116±4
Number of stars in system 3
Number of planets in system 5

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, semi-major axis: 36.7+0.7−0.9 AU, 198+8−9 years
    •  Stellar binary, semi-major axis: < 0.3000 AU
      •  Kepler-444 B, stellar object
        •  Kepler-444 C, stellar object
        •  Kepler-444 A, stellar object
          •  Kepler-444 b, planet, semi-major axis: 0.0418±0.0008 AU
            •  Kepler-444 c, planet, semi-major axis: 0.0488±0.0009 AU
              •  Kepler-444 d, planet, semi-major axis: 0.0600±0.0011 AU
                •  Kepler-444 e, planet, semi-major axis: 0.0696±0.0013 AU
                  •  Kepler-444 f, planet, semi-major axis: 0.0811±0.0015 AU

                PlanetsPlanets in the system

                This table lists all planets in the system Kepler-444.

                  Kepler-444 b Kepler-444 c Kepler-444 d Kepler-444 e Kepler-444 f
                Alternative planet names Kepler-444 A b, HIP 94931 A b, KOI-3158.01, KOI-3158 A b, KIC 6278762 A b, LHS 3450 A b, PPM 58152 A b, TYC 3129-329-1 b, BD+41 3306 A b Kepler-444 A c, HIP 94931 A c, KOI-3158.02, KOI-3158 A c, KIC 6278762 A c, LHS 3450 A c Kepler-444 A d, HIP 94931 A d, KOI-3158.03, KOI-3158 A d, KIC 6278762 A d, LHS 3450 A d Kepler-444 A e, HIP 94931 A e, KOI-3158.04, KOI-3158 A e, KIC 6278762 A e, LHS 3450 A e Kepler-444 A f, HIP 94931 A f, KOI-3158.05, KOI-3158 A f, KIC 6278762 A f, LHS 3450 A f
                Description This planet is part of the Kepler-444 system. The planetary system is tightly placked with at least 5 terrestrial planets. The host star formed 11 billion years ago, when the universe was less than 20 percent of its current age. This makes Kepler-444 the oldest known system of terrestrial size planets. The star has a companion binary that gets as close as 5 AU at periastron.edit This planet is part of the Kepler-444 system. The planetary system is tightly placked with at least 5 terrestrial planets. The host star formed 11 billion years ago, when the universe was less than 21 percent of its current age. This makes Kepler-444 the oldest known system of terrestrial size planets. The star has a companion binary that gets as close as 5 AU at periastron.edit This planet is part of the Kepler-444 system. The planetary system is tightly placked with at least 5 terrestrial planets. The host star formed 11 billion years ago, when the universe was less than 20 percent of its current age. This makes Kepler-444 the oldest known system of terrestrial size planets. The star has a companion binary that gets as close as 5 AU at periastron.edit This planet is part of the Kepler-444 system. The planetary system is tightly placked with at least 5 terrestrial planets. The host star formed 11 billion years ago, when the universe was less than 20 percent of its current age. This makes Kepler-444 the oldest known system of terrestrial size planets. The star has a companion binary that gets as close as 5 AU at periastron.edit This planet is part of the Kepler-444 system. The planetary system is tightly placked with at least 5 terrestrial planets. The host star formed 11 billion years ago, when the universe was less than 20 percent of its current age. This makes Kepler-444 the oldest known system of terrestrial size planets. The star has a companion binary that gets as close as 5 AU at periastron.edit
                Lists Confirmed planets; Planets in binary systems, S-type
                Mass [Mjup] N/A N/A N/A N/A N/A
                Mass [Mearth] N/A N/A N/A N/A N/A
                Radius [Rjup] 0.0367+0.0015−0.0013edit 0.0453+0.0019−0.0015edit 0.0483+0.0020−0.0017edit 0.0498+0.0015−0.0014edit 0.068±0.004edit
                Radius [Rearth] 0.403+0.016−0.014 0.497+0.021−0.017 0.530+0.022−0.019 0.546+0.017−0.015 0.74±0.04
                Orbital period [days] 3.6001±0.0000edit 4.5459±0.0000edit 6.1894±0.0000edit 7.7435±0.0000edit 9.7405±0.0000edit
                Semi-major axis [AU] 0.0418±0.0008edit 0.0488±0.0009edit 0.0600±0.0011edit 0.0696±0.0013edit 0.0811±0.0015edit
                Eccentricity 0.08+0.22−0.08edit 0.12+0.17−0.12edit 0.18+0.16−0.18edit 0.02+0.27−0.02edit 0.29+0.20−0.19edit
                Equilibrium temperature [K] N/A N/A N/A N/A N/A
                Discovery method transit
                Discovery year 2015
                Last updated [yy/mm/dd] 15/07/28 15/07/28 15/07/28 15/07/28 15/02/01

                starStars in the system

                This table lists all stars in the system Kepler-444.

                  Kepler-444 A Kepler-444 B Kepler-444 C
                Alternative star names HIP 94931 A, KOI-3158 A, KIC 6278762 A, LHS 3450 A, PPM 58152 A, TYC 3129-329-1, BD+41 3306 A HIP 94931 B, KOI-3158 B, KIC 6278762 B, LHS 3450 B, PPM 58152 B, BD+41 3306 B HIP 94931 C, KOI-3158 C, KIC 6278762 C, LHS 3450 C, PPM 58152 C, BD+41 3306 C
                Mass [MSun] 0.76±0.04edit 0.29±0.03edit 0.25±0.03edit
                Radius [RSun] 0.752±0.014edit N/A N/A
                Age [Gyr] 11.2+0.9−1.0edit N/A N/A
                Metallicity [Fe/H] -0.55±0.07edit N/A N/A
                Temperature [K] 5046±74edit 3464±200edit N/A
                Spectral type K0V M M
                Visual magnitude 8.86edit 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).

                PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterKepler-444 bKepler-444 cKepler-444 dKepler-444 eKepler-444 f

                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.

                Kepler-444 bKepler-444 cKepler-444 dKepler-444 eKepler-444 f

                referencesScientific references and contributors

                Links to scientific papers and other data sources

                history http://arxiv.org/abs/1501.06227
                history http://arxiv.org/abs/1505.02814
                history http://openexoplanetcatalogue.com/planet/Kepler-444%20f/
                history http://adsabs.harvard.edu/abs/2016ApJ...817...80D
                history http://arxiv.org/abs/1512.03428
                history http://cdsads.u-strasbg.fr/abs/2015ApJ...799..170C

                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 5
                Chrissy Teagan 1
                Christian Sturm Sol-d(at)users.noreply.github.com 1
                Hanno Rein hanno(at)hanno-rein.de 1
                Senger Hanno hanno.senger(at)hotmail.de 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.