Find an exoplanet transit to observe! Select a region below and choose an event near your location.

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Featured Exoplanet Transit for November 2022

Catch the Wandering Transit of a Super-Puff Planet

Ready to observe HIP-41378 f? Watch the video to see when the transit will be visible to you and click on this Observation Link when you are ready to start an observation. For more information, select your region from the drop down menu above. Then, scroll down the table and select the row for HIP-41378 f to display the observation settings and visibility map. Ensure those settings are implemented so that your observation goes smoothly.

This November 12-14, citizen astronomers have a chance to observe a cool “super-puff” exoplanet, a gas giant with a uniquely low density. This planet, the outermost planet in a family of five, is almost the size of Jupiter with only a fraction of its mass.

Exoplanet HIP-41378 f was first observed by NASA’s Kepler Mission in 2016. Although a single transit was observed by Kepler, and later the Hubble Space Telescope, there are still plenty of mysteries to be solved. For example, the predicted timing of its transits slightly disagree with what astronomers actually observe. These differences are called “transit timing variations,” and may indicate the presence of an exo-moon or gravitational tugs from this planet’s siblings.

The exoplanet HIP-41378 f has a longer year, or period, than Earth at 542 days. Therefore, it will take approximately 18 hours to transit its host star. With an event this long, only a network of people around the world, working to observe the same transit, will be able to catch the dimming and brightening of the planet’s sun. If successful, the results from this campaign could merit observations from JWST.


Predictions Table Explained


Symbols

  • Blue stars & shading = full visibility (you can observe the entire event)
  • Yellow triangles = full visibility but some tracking difficulty (when target altitude > 70 degrees)
  • Orange diamonds = partial visibility; you may miss the start or end of the event
  • No symbol = no visibility (either the target is not up or it is too close to daytime)
  • Click on a symbol on the map to show precise observation times, target altitudes, and Sun altitudes specific to that location.

Table

  • The Link automatically populates observing settings into the Unistellar app’s “Exoplanet transits” Science menu.
    • Note that these links will only work from your smartphone/tablet with the Unistellar app installed.
  • Finder is an image of the target field of view (your live view may be rotated by comparison).
  • Date is the observation start date in UTC (Coordinated Universal Time).
  • Start UTC is the overall event’s observation start time in UTC. Your own start time may differ — click on the visibility map’s icons for location-specific times.
  • End UTC is the overall event’s observation end time in UTC. Your own end time may differ — click on the visibility map’s icons for location-specific times.
  • Local is the observation start time in the time zone of your device’s browser.
  • eVscope settings are in Exp (exposure time in milliseconds), Gain (in decibels), Cad (cadence in milliseconds), Ra (right ascension), & Dec (declination).