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Ephemeris: 04/11/2025 – Thoughts on Starliner and Artemis problems
This is Ephemeris for Friday, April 11th. Today the Sun will be up for 13 hours and 18 minutes, setting at 8:23, and it will rise tomorrow at 7:03. The Moon, 1 day before full, will set at 6:44 tomorrow morning.
As someone who has watched the Apollo program progress, back in the 1960s, and the race to get to the Moon before the Russkies, the Artemis program seems rather sluggish. Most of the reason of course, is because it isn’t enough of a high priority, and we’re trying to do it on the cheap, reusing as much of the ill-fated space shuttle hardware as possible. NASA is gun shy about putting astronauts into danger, when they don’t have to. The Apollo 1, and two Space Shuttle accidents is the main reason that Butch and Suni didn’t ride back to Earth in their ailing Starliner capsule. The Starliner capsule is built by the same company, Boeing, who is prime contractor on the main stage of the moon rocket. Both have experienced long delays, and quality issues.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). Times will be different for other locations.
Addendum
01/10/2023 – Ephemeris – The constellation of Orion the hunter, unlucky in love
This is Bob Moler with Ephemeris for Tuesday, January 10th. Today the Sun will be up for 9 hours and 3 minutes, setting at 5:22, and it will rise tomorrow at 8:18. The Moon, halfway from full to last quarter, will rise at 9:01 this evening.
Before the Moon rises tonight, we will have two hours of darkness. Winter’s central constellation, Orion the hunter, doesn’t need the Moon to be absent to see its principal stars. He’s in the southeast before the Moon rises with red Betelgeuse in one shoulder and dimmer Bellatrix on the other, Saiph at one knee and bright blue-white Rigel at the other. Between his shoulders and knees runs his belt of three stars in a line. Above Betelgeuse, he is holding a club aloft and from Bellatrix he holds a lion skin shield to defend himself from the charge of Taurus the bull, above and right of him. I consider him a hard luck hero, with three different stories on how he died. Unlucky in love, he’s consigned to chase the Seven Sisters of the Pleiades throughout eternity.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.
Addendum
Orion finder animation with Mars. First, showing the unannotated sky looking southeast at Orion. Second, Orion with lines and labels of the stars at the corners of his body, and other bright stars in the view, plus the Pleiades and bright planet Mars, that’s just happening to be passing through this year. Third, the constellation art for Orion and Taurus the bull. Created using Stellarium, LibreOffice Draw and GIMP.
Here are the three stories of how Orion died: One: Orion raped the goddess Artemis, and so she killed him. Two: Orion was betrothed to Artemis, but her twin brother Apollo was jealous and caused her to kill him in a hunting “accident”. Three: Orion was killed by the sting of a scorpion, which is the reason Orion and Scorpius are never in the sky at the same time.
12/30/2021 – Ephemeris – Looking forward to some space events in 2022
This is Ephemeris for Thursday, December 30th. Today the Sun will be up for 8 hours and 51 minutes, setting at 5:11, and it will rise tomorrow at 8:20. The Moon, 2 days before new, will rise at 6 tomorrow morning.
If you thought 2021 was an active one in space, 2022 looks to be as exciting. The James Webb Space Telescope will continue to deploy itself as it journeys to reach it’s L2 halo orbit. It should become operational by mid-year. The launch of the uncrewed Artemis-1 mission to, and around the Moon, has been pushed back a month to no earlier than March 12th, because of having to swap out a control computer for one of its main engines. The launch of the Psyche probe to the mostly metallic asteroid of the same name will occur in August by a SpaceX Falcon Heavy rocket on a four-year journey to orbit this unique asteroid. And NASA’s DART spacecraft is scheduled to crash into the tiny Dimorphos asteroid to test a deflection method in late September.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). They may be different for your location.
Addendum
James Webb Space Telescope trajectory to L2 with some milestones of deployment. “ISIM” stands for Integrated Scientific Instruments Module. Credit: Space Telescope Science Institute (STScI).
Artemis-1 orbital plan. Click on the image to enlarge it. Credit NASA.
Psyche spacecraft at the asteroid Psyche. Credit: NASA.
Schematic of the DART mission shows the impact on the moonlet of asteroid (65803) Didymos. Post-impact observations from Earth-based optical telescopes and planetary radar would, in turn, measure the change in the moonlet’s orbit about the parent body.
Credits: NASA/Johns Hopkins Applied Physics Lab
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