Archive for November 25, 2019

11/25/2019 – Ephemeris – Fomalhaut has a visible exoplanet

November 25, 2019 Comments off

Ephemeris for Monday, November 25th. Today the Sun will be up for 9 hours and 14 minutes, setting at 5:06, and it will rise tomorrow at 7:53. The Moon, 1 day before new, will rise at 7:41 tomorrow morning.

The lonely bright star low in the south at 8 p.m. these evenings is Fomalhaut the harbinger of autumn in my book, and about to leave as winter approaches. Fomalhaut means fishes mouth and is located at the head of Piscis Austrinus, a very dim constellation. Fomalhaut is a young white star only about 400 million years old with a disk of dust surrounding it. Near an outer dust ring, 15 years ago the Hubble Space Telescope discovered a spot. Four years later astronomers discovered that the spot moved along the dust lane and announced the first direct discovery of an exoplanet. In 2010 and 2012 the planet now dubbed Fomalhaut b or Dagon was observed again and it really does orbit Fomalhaut in a very eccentric orbit.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.


Fomalhaut in the south at 8 p.m. on November 15, 2012. Created using Stellarium.

Fomalhaut in the south at 8 p.m. in November. Created using Stellarium.

Fomalhaut b

The track of observations of Fomalhaut b or Dagon in 2004, 2006, 2010 and 2012. Credit: NASA and ESA –, Public Domain,