Saturday, October 5, 2019
PLEIADES Taken by Doug Backlund on October 2, 2019 @ Ajo, AZ
Canon 500mm f4, 7DMII, f4, ISO 1600, 46x60sec. Losmandy G11, unguided
THE 2019 TRANSIT OF MERCURY
Mark your calendar: On Monday, Nov 11th, Mercury will pass directly in front the sun. The rare transit begins at 12:35 UT (7:35 am EST) and lasts for almost six hours. Mercury's tiny form—jet black and perfectly round—will glide slowly across the solar disk, as shown in this movie created by science-artist Larry Koehn of ShadowandSubstance.com:
People in every continent except Australia can see at least a portion of the crossing. In the USA, the best place to be is on the Atlantic coast, where the entire transit is visible. On the Pacific coast the transit will already be in progress at sunrise.
Warning! Do not stare at the sun during the transit. Mercury covers a tiny, tiny fraction of the solar disk, so the sun remains as bright as ever. Eye damage can occur.
Eclipse glasses will keep your eyes safe, but they won't help you see Mercury. The planet is only 1/194th of the sun's apparent diameter. A safely-filtered telescope with a magnification of 50x or more is recommended to watch this event.
Nothing beats a telescope equipped with an H-alpha filter. H-alpha filters are narrowly tuned to the red glow of solar hydrogen. They reveal the sun as a boiling inferno cross-crossed by writhing magnetic filaments. On Nov. 11th, the tiny form of Mercury will join the fray.
Transits of Mercury occur only 13 times each century. The next one won't occur until Nov. 13, 2032. This is an unusual event, not to be missed, so stay tuned.
Friday, October 4, 2019
NEPTUNE Taken by Kevin Witman on September 21, 2019 @ Cochranville, PA, USA
With the recent opposition of our 8th planet, I attempted to image this distant ice world in RGB and with a Baader 610 Longpass filter. The image size at f/10 was so very tiny in my 10" scope. Doubtful of any chance to catch a bright storm in its clouds with this set-up. I combined an RGB image, 610nm LP image and an overexposed 610nm LP image (for Triton).
Images recorded using a Meade LX50 10" SCT, ZWO ADC, a ZWO ASI290MM and a IS DFKAU04. Processed using WINJUPOS, AS3, Registax 6, and PS5
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