HAT-P-12

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title: "HAT-P-12" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["k-type-main-sequence-stars", "canes-venatici", "planetary-systems-with-one-confirmed-planet", "planetary-transit-variables", "stars-with-proper-names"] description: "K-type main sequence star in constellation Canes Venatici" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/HAT-P-12" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary K-type main sequence star in constellation Canes Venatici ::

| name = HAT-P-12 / Komondor | epoch = J2000 | constell = Canes Venatici | ra = | dec = | appmag_v = 12.84 | type = main sequence | class = K4 | appmag_1_passband = J | appmag_1 = | appmag_2_passband = H | appmag_2 = | appmag_3_passband = K | appmag_3 = | variable = planetary transit | radial_v = | prop_mo_ra = | prop_mo_dec = | pm_footnote = | parallax = 7.0448 | p_error = 0.0105 | parallax_footnote = | absmag_v = |source= | mass = 0.719 | radius = 0.7084 | luminosity = 0.21 | temperature = 4710 | metal_fe = −0.24 | gravity = 4.594 | rotation = 0.5 km/s | age_gyr = 2.5 | names = | Simbad = GSC+03033-00706 | EPE = HAT-P-12 | NSTED = HAT-P-12

HAT-P-12, also named Komondor, is a magnitude 13 low-metallicity K dwarf star approximately 463 light years away in the constellation Canes Venatici, which hosts one known exoplanet.

Nomenclature

The designation HAT-P-12 indicates that this was the 12th star found to have a planet by the HATNet Project.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. The approved names, proposed by a team from Hungary, were announced in June 2023. HAT-P-12 is named Komondor and its planet is named Puli, after the Hungarian Komondor and Puli dog breeds.

Planetary system

In 2009 an exoplanet, HAT-P-12b, was discovered by the HATNet Project orbiting this star. The planet was discovered using the transit method and confirmed by follow up radial velocity measurements. Transit-timing variations suggest the possible presence of additional non-transiting planets in the system.

| table_ref = | exoplanet = b / Puli | mass = 0.211 | radius = 0.95 | period = 3.2130598 | semimajor = 0.0384 | eccentricity = 0 | inclination = | exoplanet = c | mass = 0.218 | period = 8.853 | semimajor = | eccentricity = 0.15499 | inclination = 73.5

References

References

1. {{Cite Gaia DR3. 1499514786891168640
2. (8 August 2022). "List of ExoWorlds 2022". [[International Astronomical Union.
3. (2009). "HAT-P-12b: A Low-density sub-Saturn mass planet transiting a metal-poor K dwarf". The Astrophysical Journal.
4. (2018). "The GAPS programme with HARPS-N at TNG. XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60". Astronomy and Astrophysics.
5. "2022 Approved Names". [[International Astronomical Union.
6. {{Cite constellation. HAT-P-12
7. Sariya, Devesh P.. (2021-05-01). "Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b". Research in Astronomy and Astrophysics.
8. "HAT-P-12".
9. (1 July 2021). "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves". The Astrophysical Journal Supplement Series.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::