Partial Beauty

Normally a partial eclipse, be it Lunar or Solar, is an interesting phenomenon that I'll observe and maybe snap a few photos - if it's convenient. Having seen my share over the years it's not something I am going to plan a PTO day for. It's pretty much a "yep, there's the hunk taken out of the Moon/Sun, right as it should be" event.

The partial Lunar eclipse last week was a bit of a different animal. First, it was darn near total at 99% - a circumstance that had not occurred in quite some time (the media was all over it heralding it as the longest partial eclipse in 500 years). Secondly, unlike a Solar eclipse where that 1% makes a huge difference in what you see, a Lunar eclipse so close to totality would likely be a fine sight. Prior Lunar eclipses have always begun to turn the Moon orangish before becoming totally immersed in the Earth's shadow, so certainly that should occur with this one.

Thursday evening started off overcast but with promises from the weather prognosticators that skies would clear after midnight. With calling out to work the next morning not an option I planned to do some simple naked eye viewing and perhaps try to grab a few shots with the camera. After the HAL meeting I got the Canon onto the tripod and set the alarm for about ten minutes prior to shadow maximum.

All too soon the phone began to chime and I arose to peek out the western bedroom window to see what we had. There it was, a dark red orb with bright edge at about 8 o'clock.

Faux "Diamond Ring"

What immediately leapt to mind was how we sort of had a Lunar eclipse version of the "Diamond Ring", the tiny part of lunar limb still bathed in sunlight acting like the emerging Sun at 3rd contact. HAL member Richard Orr did an excellent job of capturing the effect in his photo seen here. It was a beautiful and slightly eerie sight, resonating on an emotional level with ancient cultures who would be concerned about what was happening to the Moon.

Hyades, Pleiades, and Eclipsed Moon

While it was cold out it was no where near as bitter as the last Lunar eclipse (January 2019) under a "polar vortex". As my eyes adapted to the night I took a moment to appreciate the beautiful scene before me - a ruddy Moon beneath the Pleiades and adjacent to Hyades (the "V" asterism of Taurus). Framing the Moon on the camera's display at the lens' maximum focal length of 300mm I worked to get a focus. While there are a lot of pluses when using a digital camera rather than film, I hate the Buzz Lightyear nature of focusing where you can go to infinity and (just a tad) beyond. In the good old days you twisted the focus collar all the way to infinity and you were confident you had Moon and stars in sharp focus. And as fate would have it, my high power shots proved to be a tad soft once I saw them displayed on my laptop later that morning.

I went through a variety of lower focal lengths and exposures to record the surreal beauty of the coppery Moon gracing Taurus. After about half an hour I went back inside to warm up and nap a little before starting the day. My preparation and the eclipse itself might have been partial, but the enjoyment and beauty of it was total.

Pleiades and Partially Eclipsed Moon

The Venus Show

One thing is for certain - the disruption of our routines thanks to the COVID-19 virus outbreak has created a vacuum. Binge-watching has taken center stage for a lot of America, but if you step outside you'll find another show streaming through the evening twilight. Venus has been dazzling, high above the horizon like a super intense LED. Even the average person out for their stroll around the neighborhood notices this gem in the western sky.

Our sister planet returned to the evening twilight last fall. I recall catching sight of her in early November heading south on I-81 in Virginia on our way to NC, anchoring a wonderful Zodiacal alignment of Venus-Jupiter-Saturn. Slowly but steadily since then, like a diver ascending the ladder to the high dive platform, Venus has been gaining altitude from the Sun's glare.

Venus and crescent Moon Thanksgiving evening 2019

This evening apparition has been particularly auspicious, hitting a trifecta + one of favorable celestial mechanics. First, for us spring brings the angle of the ecliptic - that imaginary highway that the visible planets traverse - to its steepest angle with the horizon, reaching 73° on March 24th. This means that every degree that a planet lies from the Sun translates to maximum distance above our northern hemisphere horizon.

Next, that date of steepest ecliptic coincided with Venus reaching the point in its orbit where it forms a right angle alignment between itself, the Sun, and us - i.e., the greatest distance it can appear separated from our home star. The result of all this? Our brilliant neighbor began the evenings in late March a full 44° above the horizon, an inner-planet party animal that stayed up until close to midnight.

Another favorable aspect is that on March 20th the planet was at perihelion - the point in its orbit where it lies closest to the Sun. This contributes slightly to the planet's brightness so that when it hits that sweet spot between disk size and phase on April 28th it achieves an eye-catching maximum brilliance of -4.4 magnitude. While it may not be visually apparent that Venus is reaching an incremental notch above its normal brilliance it is as good as it gets (but don't tell the press less we start a "Super Venus!" meme). 

Perhaps the pièce de résistance of this apparition was Venus making a call upon the Pleiades, passing through their midst on April 3rd. While not rare (it happens every 8 years due to celestial mechanics returning Venus to roughly the same spot) it is one of the most lovely and photogenic conjunctions around. I have (somewhere) a shot of a similar alignment some 24 years ago taken on film. This time around I used the digital magic of taking 200+ shots with my 200mm lens and stacking them to produce a nice souvenir of the occasion (star spikes courtesy of Photoshop).

M45 and Venus on Apr 2, 2020

 

But wait - there's more! Like that diver perched high above on the platform our sister planet is preparing to swan dive into the glare of the Sun. Once we reach dichotomy (half phase) Venus becomes a more interesting target for amateur astronomers with even a modest scope. We enter a period where the size and apparent phase alter week by week and then day by day as we approach the June 3rd inferior conjunction date. If you have never tried to spot Venus in the daytime you'll have a great opportunity on April 26th using the Moon as your guide as it slides roughly 5° south of the planet. It also is a great time to see how soon you can pick out the phase using only binoculars or capture it using only your telephoto lens.

Remember, you don't have to practice social distancing with your old friends in the night sky - let them infect you with their beauty and mystery!