August 13, 2016
p.m. to 11:00 p.m.
Rudy Park, York, PA. Observatory
will be an Astronomy Program in the Observatory August 13th if cloudy.
York County Astronomical Society, Inc. is a non-profit organization
dedicated to the advancement of the science of astronomy.
Expand your mind by taking in the expanse of the universe.
Come and view the night skies with us through one of our telescopes and let our experienced
members guide you on a tour of celestial wonders, including stars, planets,
nebulae, and the moon. You are also invited to bring your own telescope and
share your experiences with other amateur astronomers. Star Charts are available to help your exploration of the nighttime sky.
observing activities at John Rudy Park, if the weather is questionable, please check our voice message at
for notice of any late cancellation or for an updated
status, check this website.
Observatory See: Directions
If it is clear or mostly clear, the activity will occur as scheduled. If it is completely cloudy, raining or snowing, the activity will be changed to an astronomical presentation.
information on events, scheduling a private party star watch, directions
to the observing site, or for general Society information
please email YCAS at: E-Mail
The August 13, 2016 Public Observing Night Sky
Sun sets at 8:05 p.m. and is located in the constellation Leo
evening sky finds the Moon in the west southwest
in the constellation Sagittarius and is at phase 80.14% lit at
10:00 p.m.. The Moon sets at 1:47 a.m. The Moon is only 00°46'47"
degrees (less than 1/2 degree) from M-23
star cluster. See: Moon
Map. See: How
to find degrees.
is visible in the south after sunset located in the constellation
Scorpius. Mars photo below shows it's features facing Earth this
night at 10:00 p.m. on August 13th. When you look at Mars this night
your seeing the
planet as it appeared 6.6 minutes ago due to
the 73,774,000 million miles it takes light traveling at 186,000
miles per second to reach your eyes from Mars.
Jupiter is located very very low in the west this night located in the constellation
sets at 9:31 p.m. seen from a flat horizon so, to see Jupiter you
will have to look around 8:30 to 9:00 p.m. due to the trees at the
observatory. When you look at Jupiter your seeing the
planet as it appeared 52 minutes ago due to
the 582,871,000 million miles it takes light traveling at 186,000
miles per second to reach your eyes from Jupiter. Jupiter the fifth planet from the Sun
is the largest planet in the Solar System. It has a mass one-thousandth that of the
Sun. Jupiter's moons below as seen at 8:30 p.m. on August
will show you the beautiful rings of Saturn. Saturn
the ringed planet is located in the south in
the constellation Ophiuchus.
Saturn appears as a pale yellow glow compared to the color of the background
of stars and sets at 1:03 a.m.. When you look at
Mars this night your seeing the
planet as it appeared 80.5 minutes ago due to
the 899,381,995 million miles it takes light traveling at 186,000
miles per second to reach your eyes from Mars. Image below shows the location of some of Saturn's icy moons at
observing night. Titan,
moon is 5,150 km diameter, it is the second largest moon in the Solar System.
Titan should be visible at magnitude 9.7 this night.
in the east early evening are the
constellations Lyra with the famous ring nebulae M-
57, Ophiuchus, Libra and
in the constellation Hercules with the beautiful globular cluster
of stars containing hundreds of thousands of stars known as M13.
Summer Triangle consisting of the constellations Lyra with its
bright star Vega, Cygnus with its bright star Deneb and Aquila
with bright star Altair make up the triangle visible rising in the
in the southeast is Scorpius
and in the southwest the constellation Hydra. High in the sky is
Virgo, Coma Berenices, Cane Venatici and Bootes. Lower
in the western sky is the constellation Leo the Lion and below Leo
is the constellation Cancer and just above the horizon is the setting
constellation Gemini the Twins. In the
north is the Big Dipper to the left of the Little Dipper which
contains Polaris the north
star. See How to use the Big
Dipper to find Polaris the north star. See: Finding
These are just a few of the many constellations visible this
August 13, 2016 Night Sky Below
a memorable tour with members of the York County Astronomical Society of
Galaxies, planets, the moon and the constellations of the night sky.
and Constellations Astronomical Pronunciation Guide
the Wonders of your Universe
Picture of the Day
Our sun is almost one million miles in diameter and a million earths would fit in it.
It takes light eight minutes to reach us from the sun.
The last star shown in video is VY Canis Majoris which takes light about 5000 years to reach us
that is light traveling at 186,000 miles per second x 60 seconds
in a minute x 60 minutes in an hour x 365 days in a year x 5000 years.
VY Canis Majoris is (almost 2 billion ) 1.7 billion miles in diameter.
POLLUTION OF OUR NIGHT SKIES
What does light pollution look like?
What does your nighttime sky look like? Try this fun interactive game to see how light
pollution affects the stars you see at night:
Dark Sky Association
Weather and Directions