Fork me on GitHub
an open source database of all discovered extrasolar planets

HD 180617

The planetary system HD 180617 hosts at least 2 planets. Note that the system is a multiple star system. It hosts at least 2 stellar components.

  System parameters
Primary system name HD 180617
Alternative system names GJ 752, Gl 752, Gliese 752, LDS 6334, VB 10
Right ascension 19 16 55.2565250393
Declination +05 10 08.038856129
Distance [parsec] 5.912±0.018
Distance [lightyears] 19.28±0.06
Number of stars in system 2
Number of planets in system 2

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
    •  HD 180617, stellar object
      •  HD 180617 b, planet, semi-major axis: 0.336±0.010 AU
      •  VB 10, stellar object
        •  VB 10 b, planet, semi-major axis: 0.360+0.006−0.016 AU

      PlanetsPlanets in the system

      This table lists all planets in the system HD 180617.

        HD 180617 b VB 10 b
      Alternative planet names N/A N/A
      Description HD 180617 b is a Neptune-mass planet in an eccentric orbit near the liquid water zone of the M-dwarf primary of the LDS 6334 binary system. The secondary star is the ultracool dwarf VB 10. The planet candidate VB 10 b was claimed on the basis of astrometric measurements made as part of the Stellar Planet Survey (STEPS) program. Subsequent radial velocity and astrometric measurements failed to confirm the planet's existence.
      Lists Confirmed planets; Planets in binary systems, S-type Retracted planet candidate; Planets in binary systems, S-type
      Mass [Mjup] 0.038+0.003−0.004 6±3
      Mass [Mearth] 12.2+1.0−1.4 2034+826−985
      Radius [Rjup] N/A N/A
      Radius [Rearth] N/A N/A
      Orbital period [days] 105.90+0.09−0.10 272+7−3
      Semi-major axis [AU] 0.336±0.010 0.360+0.006−0.016
      Eccentricity 0.16+0.05−0.10 < 0.9800
      Equilibrium temperature [K] N/A N/A
      Discovery method RV astrometry
      Discovery year 2018 2009
      Last updated [yy/mm/dd] 18/08/14 N/A

      starStars in the system

      This table lists all stars in the system HD 180617.

        HD 180617 VB 10
      Alternative star names V1428 Aql, V1428 Aquilae, HIP 94761, TYC 472-1252-1, Gaia DR2 4293318823182081408, BD+04 4048, GJ 752 A, Gl 752 A, Gliese 752 A, LDS 6334 A, WDS J19169+0510 A V1298 Aql, V1298 Aquilae, Gaia DR2 4293315765165489536, GJ 752 B, Gl 752 B, Gliese 752 B, LDS 6334 B, WDS J19169+0510 B
      Mass [MSun] 0.45±0.04 0.0779
      Radius [RSun] 0.453±0.019 N/A
      Age [Gyr] N/A N/A
      Metallicity [Fe/H] 0.00±0.16 N/A
      Temperature [K] 3557±51 N/A
      Spectral type M2.5V M8V
      Visual magnitude 9.12 17.30

      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).

      PlutoMercuryMarsVenusEarthNeptuneUranusSaturnJupiterHD 180617 bVB 10 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.

      HD 180617

      Habitable zoneHD 180617 b

      VB 10

      Habitable zoneVB 10 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
      Andrew Tribick ajtribick(at) 1
      Hanno Rein hanno(at) 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 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.