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01/21/2021 -Ephemeris – The Perseverance rover is less than a month from landing on Mars

21 Jan 2021, 05:01 UTC
01/21/2021 -Ephemeris – The Perseverance rover is less than a month from landing on Mars
(200 words excerpt, click title or image to see full post)

This is Ephemeris for Thursday, January 21st. Today the Sun will be up for 9 hours and 24 minutes, setting at 5:36, and it will rise tomorrow at 8:11. The Moon, 1 day past first quarter, will set at 2:40 tomorrow morning.
The Mars Perseverance Rover is approaching the Red Planet. In a bit less than a month, on February 18th it will plunge into the martian atmosphere to land near an ancient river delta in the 28 mile (45 kilometer) wide crater Jezero. The dramatic entry-descent-and-landing or EDL is what the Jet Propulsion Laboratory, that built and manages the rover, calls Seven Minutes of Terror due to the complexity of the landing process and the fact that they will be bystanders at that point. By the time they receive confirmation that the encapsulated rover has hit the top of the martian atmosphere it would have already landed, or crashed on the martian surface. It will take over 11 minutes for signals to reach us from Mars that day.
The event times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.
Addendum
Delta of ancient river that flowed into a lake in the ...

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