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Messier Marathon 2017 (NHAC Dark Site!)

March 25, 2017 @ 8:00 pm - March 26, 2017 @ 6:30 am

Take the Challenge of the Messier Marathon 2017!

Date: 25 – 26 March

Time: All night (From Sunset to Morning Day Break!) 

(Last Weekend of March 2017)

Bring your telescopes, binoculars, drinks, snacks, insect repellent, star atlases, red lights, chairs, folding tables, etc.. Come and Enjoy with the club the wonderful nights at our Dark Site for some great observing during the first New Moon weekend of 2017!

This is a once in a year event where between the period of Mid – March to Early April all 110 objects of the famous Messier Catalog of Deep Sky Objects can be observed from just after sunset when skies conditions are clear and satisfactory dark to the same conditions before the end of Nautical twilight the following day! The purpose of this marathon is an ‘all – night’ event for any amateur astronomer using a small to moderate size telescope to try and capture as many of the objects in the messier catalog before night’s end or until exhaustion sets in for you.  

We encourage as many of our NHAC members to come out to the Club Dark Observing Site to participate in this event through the night between the days on the last weekend of March 2017! 

More information will be posted soon on the website! 


Starts at 7:36 PM & Ends at 7:38 PM 

Civil Twilight

Starts at 7:38 PM & Ends at 8:02 PM 

Nautical Twilight

Starts at 8:02 PM & Ends at 8:30 PM 

Astronomical Twilight

Starts at 8:30 PM & Ends at 8:59 PM

Optimal Night Time Observing

Starts at 8:59 PM & Ends at 5:59 AM (Following Day)

Astronomical Twilight

Starts at 5:59 AM & Ends at 6:28 AM (Following Day)

Nautical Twilight

Starts at 6:28 AM & Ends at 6:56 AM (Following Day)

All times are in Central Daylight Savings Time!

Please adhere to the policies and Dark Site etiquette for night sky observing at the ‘O’Brien Dark Site’ since this location is in fairly dark skies. We need all those who are club members or invited quests to be aware of those who come out to enjoy a night of observing under the Stars! All information is available in the ‘members only’ section of the club website available to those who have updated their dues and membership.

There is no front gate the field is located to the right (West Side) of the property. There are no electrical outlets, so everything you bring that requires electricity will need to supply your own batteries and power units. The club’s storage unit is located near the fence on the far side of the field opposite to the road. O’Brien’s do provide restroom accommodations!

For more information about the Dark Site’s etiquette/policies go to the following club webpage: O’Brien Dark Site

To Learn more about our Dark Site Policies & Etiquette (Click on the following link): O’Brien Dark Site’s policies & procedures


March 25, 2017 @ 8:00 pm
March 26, 2017 @ 6:30 am