HAT-P-6

Quality 0.50 · 0 views · Updated 2 months ago

Star in the constellation Andromeda

title: "HAT-P-6" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["f-type-main-sequence-stars", "planetary-transit-variables", "andromeda-(constellation)", "planetary-systems-with-one-confirmed-planet", "durchmusterung-objects", "tess-objects-of-interest", "stars-with-proper-names"] description: "Star in the constellation Andromeda" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/HAT-P-6" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Andromeda ::

| name = HAT-P-6 / Sterrennacht | epoch = J2000.0 | constell = Andromeda | ra = | dec = | appmag_v = +10.47 | class = F8V | r-i = | v-r = | b-v = 0.41 | u-b = | variable = planetary transit | radial_v = | prop_mo_ra = | prop_mo_dec = | pm_footnote = | parallax = 3.6459 | p_error = 0.0221 | parallax_footnote = | absmag_v = | mass = 1.29 ± 0.06 | radius = 1.46 ± 0.06 | luminosity = | gravity = 4.22 ± 0.03 | temperature = 6,570 ± 80 | metal_fe = –0.13 ± 0.08 | rotational_velocity = 8.7 ± 1.0 | age_gyr = 2.3 | names = , HAT-P-6 | Simbad = HAT-P-6 | NSTED = HAT-P-6

HAT-P-6, also named Sterrennacht is a star in the constellation Andromeda, located approximately 895 light years or 274 parsecs away from the Earth. It is an F-type star, implying that it is hotter and more massive than the Sun. The apparent magnitude of the star is +10.54, which means that it can only be visible through the telescope. The absolute magnitude of +3.36 is brighter than the Sun's +4.83, meaning that the star itself is brighter than the Sun. A search for a binary companion star using adaptive optics at the MMT Observatory turned out negative.

The name Sterrennacht (Starry Night) was selected in the NameExoWorlds held by the IAU after a painting by Van Gogh.

Planetary system

The companion planet HAT-P-6b is a transiting planet discovered on October 15, 2007 by the HATNet Project. The planet's true mass is slightly more than Jupiter at only 5.7%, but the radius is 33% greater, making the planet's density of 0.45 g/cm3. Its large size compared to mass comes from the great amount of heat received from the nearby star that expands the planet's atmosphere, categorizing as "hot Jupiter". The orbital period is 3.852985 days and the distance from its star is 0.05235 AU. The inclination of the orbit with respect to the stellar rotation axis is roughly 166º.

| table_ref = | exoplanet = b / Nachtwacht | mass = | period = | semimajor = | eccentricity = {{val|0.044|p= | inclination = | radius =

References

References

  1. "Approved names".
  2. (2013). "Adaptive Optics Images. II. 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets". The Astronomical Journal.
  3. (2017). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics.
  4. {{Cite Gaia DR3. 1925321658551399040
  5. (2008). "HAT-P-6b: A Hot Jupiter Transiting a Bright F Star".
  6. {{Cite constellation. HAT-P-6
  7. "HAT-P-6".
  8. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal.
  9. (2013). "Lucky imaging of transiting planet host stars with LuckyCam". Monthly Notices of the Royal Astronomical Society.
  10. (2011). "The retrograde orbit of the HAT-P-6b exoplanet". Astronomy and Astrophysics.

::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. ::

f-type-main-sequence-starsplanetary-transit-variablesandromeda-(constellation)planetary-systems-with-one-confirmed-planetdurchmusterung-objectstess-objects-of-intereststars-with-proper-names