Penumbral Lunar Eclipse, 10 February 2017

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Christopher K.
Posts: 4372
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Penumbral Lunar Eclipse, 10 February 2017

Post by Christopher K. » January 20th, 2017, 4:52 pm

From 4:34pm to 8:53pm CST on Friday 20 February there will be a so-called penumbral eclipse of the Moon. This is when the Moon enters only the lighter-shaded portion of the Earth's shadow, as opposed to the rich and dark shadow that caused the better known partial and total eclipses.

The Moon will already have been immersed in the penumbra by the time it rises in Baton Rouge at 5:45pm CST. However, Baton Rougeans will be able to see (if they look carefully) the Moon slide out of the penumbra. The time of greatest (or deepest) eclipse will be 6:45pm CST.

The Highland Road Park Observatory will be open this Friday night for this celestial event. This viewing session will take the place of both the lecture and the standard viewing session. HRPO will open at 6pm and close at 9pm.

More information:
February 2017 Sky & Telescope, pp. 48-49
http://www.eclipsewise.com/lunar/LEprim ... prime.html
https://eclipse.gsfc.nasa.gov/LEplot/LE ... Feb11N.pdf
http://aa.usno.navy.mil/data/docs/eclip ... 7Feb10.pdf

Christopher K.
Posts: 4372
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Penumbral Lunar Eclipse, 10 February 2017

Post by Christopher K. » February 7th, 2017, 4:43 pm

Below is the NOAA forecast for HRPO's viewing time of 6pm to 9pm Friday night...
precipitation potential, 10%
sky cover, 28%
relative humidity, 74%
temperature, 17˚C
surface wind, S 14 km/h


Excitement is building about this event!

Christopher K.
Posts: 4372
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: Penumbral Lunar Eclipse, 10 February 2017

Post by Christopher K. » February 10th, 2017, 4:42 pm

Below is the NOAA forecast for HRPO's viewing time of 6pm to 9pm...
precipitation potential, 8%
sky cover, 63%
relative humidity, 76%
temperature, 18˚C
surface wind, S 12 km/h


Danko's Clear Dark Sky states that during HRPO's viewing time the transparency rating will be "poor" (1 out of 5) and the seeing rating will be "average" (3 out of 5). This evening's Conrad Special operator is BREC Program Aide Jordan Cobbs. HRPO will stay open until 9pm.

Alan MacRobert calls tonight's situation "just about the best penumbral eclipse possible". He continues, "By the time mid-eclipse approaches, the lopsidedness of the Moon's illumination will be totally obvious".

Here is the Baton Rouge timeline...
*Penumbral Eclipse Begins: 4:34 pm CST
*Moonrise at HRPO: 5:45 pm CST
*Moon Reaches 10° Altitude: 6:39 pm CST
*Point of Greatest Eclipse: 6:45 pm CST
*Moon Begins to Exit Penumbra: ˜6:49 pm CST
*Twilight Ends: 7:11 pm CST
*Moon Reaches 20° Altitude: 7:27 pm CST
*Moon Reaches 30° Altitude: 8:15 pm CST
*Penumbral Eclipse Ends: 8:53 pm CST

Please bring a binocular if you have one. Do not bring any mechanical or electronic equipment that requires placement on the ground. Please sit or lie down only on grass--not concrete.

More information:
http://hrpo.lsu.edu/programs/eclipse.html
http://www.spaceweather.com/archive.php ... &year=2017
http://www.skyandtelescope.com/astronom ... r-eclipse/
http://www.astronomy.com/news/observing ... n-the-moon

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