Eclipse, not — Conjunction, hot!

See the eclipse? Not sure we can either. Side-by-side images made about half an hour apart, shot and processed with identical settings.

Penumbral lunar eclipses — when the Moon passes through the thin outer shadow Earth casts into space — are not spectacular. We described the July 4 – 5, 2020 eclipse as “subtle” when we wrote about it in advance. It turned out to be not-even-subtle. Essentially nobody could tell whether an eclipse had even happened, even in photographs tortured to bring out shadow details. Announcing penumbral eclipses is tricky: if nothing is said about them before they happen, we get asked why; if we promote the eclipse and even say it may be slight, people get disappointed when they hardly see the effects or don’t see anything happen at all. Still, we got to talk about the geometry of eclipses and people looked at our beautiful Moon, and that’s something.

A gorgeous high resolution portrait of Earth’s Moon at the height of the penumbral eclipse of July 4 – 5, 2020. Can’t see the eclipse shadow? Nope. That’s okay with the photographer. Credit: Alan Studt.

CAA member and accomplished photographer Alan Studt took advantage of the brilliant Moon to make its portrait. Studt explained this photo of the Moon is a composite, made up of images recorded at the peak of the eclipse. “Never saw a shadow,” he wrote, “which was fine with me.”

The Moon was shot with a telescope focal length of 4,400mm, at f/20, 1/80th sec., and ISO 250. It is made of 12 images (4 rows of 3 images)
stitched together in Lightroom and post-processed using Camera RAW in Photoshop.
Happily for skywatchers, the July Fourth holiday weekend presented a second opportunity for enjoyment: the conjunction of the “Full Buck Moon,” with planets Jupiter and Saturn. Clouds interfered, or possibly enhanced, photographic efforts. By eye, the trio was glorious with the dominant Moon, brilliant Jupiter, and shy Saturn gracing a sky full of moonglow.
Shot about an hour after moonrise, the Full Moon glowed brilliantly orange, lending color to the encroaching clouds. Jupiter is above Moon in this photo, Saturn is at the edge of a cloud on the left. A single DSLR exposure. Photo by James Guilford.

Alan Studt made his picture from two different shots/exposures: One shot for the clouds & one shot for the Moon. The clouds, Saturn, Jupiter and its moons (look closely at Jupiter) were all in one shot, 180mm, f/5. Just the Moon & clouds shot were 550mm, f6.3 Sky: 1/13th sec., ISO 5000. Moon: 1/125th sec., ISO 80. The images were post-processed in Lightroom & layer blended in Photoshop.

Conjunction photo combines separate exposures to show lunar features as well as moonlit clouds. Look closely, you may be able to make out the tiny dots of the Galilean Moons. Photo by Alan Studt.

Matt Franduto

Conjunction. by Matt Franduto.

February 10 Membership Meeting: “Lucy in the Sky with Asteroids”

An artist’s concept of the Lucy Mission. Credit: SwRI

On Monday, February 10, at 7:30 p.m. the Cuyahoga Astronomical Association (CAA) will conduct its monthly club meeting. The meeting will feature a talk by CAA member Kai Getrost, a member of the special NASA teams that performed occultation studies in support of NASA’s New Horizon’s space probe to “Ultima Thule.” He is currently working in support of NASA’s Lucy Mission to explore Jupiter’s Trojan Asteroids. The Lucy spacecraft will launch in October 2021 and, with boosts from Earth’s gravity, will complete a 12-year journey to seven different asteroids.

As part of the NASA science teams in support of the New Horizons and Lucy Missions, Getrost has traveled to South America and to Australia to help gather occultation data used to help guide the spacecraft.

The CAA’s monthly meetings are held on the second Monday of every month except December at 7:30 p.m. in the Cleveland Metroparks’ Rocky River Nature Center; 24000 Valley Parkway; North Olmsted, Ohio. Meeting programs are open to the public. Following the presentation and a brief social break, the club will conduct its membership business meeting.

Europa: Improved image from Galileo mission

Galileo’s Europa Remastered. Image Credit: NASA, JPL-Caltech, SETI Institute, Cynthia Phillips, Marty Valenti

“Looping through the Jovian system in the late 1990s, the Galileo spacecraft recorded stunning views of Europa and uncovered evidence that the moon’s icy surface likely hides a deep, global ocean. Galileo‘s Europa image data has been remastered here, using improved new calibrations to produce a color image approximating what the human eye might see. Europa’s long curving fractures hint at the subsurface liquid water. The tidal flexing the large moon experiences in its elliptical orbit around Jupiter supplies the energy to keep the ocean liquid. But more tantalizing is the possibility that even in the absence of sunlight that process could also supply the energy to support life, making Europa one of the best places to look for life beyond Earth. What kind of life could thrive in a deep, dark, subsurface ocean?” — Via APOD: Astronomy Picture Of the Day

Final Public Stargaze: October 5

Graphic: International Observe the Moon Night - October 5, 2019
Save the Night: International Observe the Moon Night, October 5, 2019

The year’s final public stargazing session hosted by the Cuyahoga Astronomical Association (CAA) will take place Saturday, October 5, from 8:00 to 10 p.m. at our Letha House Park West observatory site.

Given good sky conditions visitors will be able to view Jupiter, Saturn, star clusters, and Earth’s Moon. In fact, the date coincides with International Observe the Moon Night: a worldwide appreciation of our world’s nearest neighbor in space.

The event is free, open to the public, and is conducted as an “open house” — visitors may arrive and depart at any time during the event’s hours. The CAA’s observatory will be open and association members also will be on hand to share views through their personal telescopes.

An interesting activity any time of year is to make note of the daily changes we see in the phases of Moon. Open the PDF to print a handy guide and journal for lunar observation: Moon Observation Journal.

To find our observatory, and what to expect with a “star party,” visit the following: https://cuyastro.org/caa-observatory/