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Partial eclipse of the Sun October 23, 2014. See Tonight's Sky for upcoming celestial events here: YCAS Tonight's Sky.




New Afternoon Shows for Families, Saturday, October 25, 2014.

The York County Astronomical Society is now offering Saturday afternoon programs for young children and families at the York Learning Center Planetarium. Saturday evening, programs for older family members are presented. See shows and times here: New Shows for Families 


Lunar Astrophotography

YCAS member Kerry Smith of York, Pennsylvania took above excellent image of the Moon using a Meade ETX-90 telescope and a Firefly MV camera.

Data: Camera:
Manufacturer - Point Grey Research Model - FIREFLY MV FFMV-03MTM (Black & White) Sensor - Micron MT9V022177ATM (1/3" 640x480 CMOS) Resolution - 752x480Interface - IEEE 1394/S400. 0.3 M pixel pix B/W. Camera was mounted to a star diagonal using a C-mount to 1 1/4" eyepiece tube adapter on a Meade ETX-90 telescope. The focal length of the ETX-90 is 1250 mm. The ETX was mounted to a camera tripod with no tracking. Shutter speed was fixed at 30 FPS and pictures were saved as individual frames in JPEG format. No image stacking was used.



Image below of planet Jupiter by YCAS member Mike Wenz on November 8, 2013 showing the Great Red Spot. 

Image details:

Jupiter imaged on 11/9/13 at 4:24 am through a 10 inch Newtonian telescope. A DMK21af CCD camera was used with a Wratten #38A filter.

YCAS Speakers available

YCAS is available for educational and speaking engagements. YCAS speakers are members on a volunteer basis and therefore limited to evenings and weekends. Contact YCAS at: E-Mail YCAS


YCAS Member Discovers Asteroids

YCAS member John Sachs discovered two new unknown asteroids. For more information of discovery and animations see: Discovery


Observing The Moon

Mike and the Moon

Below is an image of the lunar crater Schiller taken by YCAS member Mike Wenz. It was taken at the YCAS observatory at John Rudy Park in York, PA using the York County's LX-200 telescope and his  DMK21AF04 CCD camera. The images were stacked using around 1000 exposures out of 1500 exposures and processed using Registax. See: Lunar images


Imaging The Moon

Below images by Michelle Wenz showing sunrise on the Lunar surface. Animation was made from Michelle's images. See More here: Lunar Sunrise

York County, Adams County, Pennsylvania Astronomy The Scout Merit Badge Program

I stood and stared; the sky was lit,
The sky was stars all over it,
I stood, I knew not why,
Without a wish, without a will,
I stood upon that silent hill
And stared into the sky until
My eyes were blind with stars and still
I stared into the sky. --Ralph Hodgson (1913)

The York County Astronomical Society, Located in York, Pennsylvania

The York County Astronomical Society, Inc. is a non-profit organization dedicated to the advancement of the science of astronomy.

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