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Archive for January 25, 2022

01/25/2022 – Ephemeris -The James Webb Space Telescope is now in orbit of Lagrange point 2 (L2)

January 25, 2022 Comments off

Note: This program was written and recorded prior to the thruster burn at 2 pm Monday, which nudged it into a halo orbit of the Earth-Sun L2 point. This post was posted after the burn.

This is Bob Moler with Ephemeris for Tuesday, January 25th. Today the Sun will be up for 9 hours and 32 minutes, setting at 5:41, and it will rise tomorrow at 8:08. The Moon, at last quarter today, will rise at 2:19 tomorrow morning.

On the James Webb Space Telescope, which should now be in a big lazy halo orbit of the Lagrangian L2, point nearly a million miles directly opposite the Sun from the Earth. Its final mid-course correction should have dropped into the halo orbit. I’m recording this Sunday night before the scheduled 2 pm yesterday mid-course correction firing. While I’m always sure it’ll be clear tonight to see the stars, or when an eclipse will happen. I’m not so sure on when or what will happen where spacecraft and rockets are involved. As far as knowing, that it will be clear tonight. I’m sure that someone will hear or read these comments, also published on my blog, and have clear skies somewhere on the planet.

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

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).

Clouds Over Great Lakes

Lake effect clouds over Michigan. Taken earlier this month by NASA via SpaceRef.com. I live somewhere on the northwestern part of the Lower Peninsula under the lake effect clouds. We haven’t had much snow from it… Yet! But winter isn’t half over, and we can get big snow storms a month into spring. We exchange sub-zero (F) cold on the western edge of the lakes for slightly warmer temperatures, clouds and snow, until the lakes freeze, if they freeze.