February 11, 2017
p.m. to 10:00 p.m.
Rudy Park, York, PA. Observatory
will be an Astronomy Program in the Observatory 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
717 759 YCAS (9227)
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 in observatory.
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
Visible for Public Observing Night Sky
February 11, 2017
Sun is in the constellation Capricornus "The Sea Goat" and sets at
Click on Moon to
Moon in Leo the Lion near
Regulus. See below image.
evening sky finds the Moon rising at 6:35 pm in the east located in the constellation
Leo the "Lion" and is at phase 98.68% lit. The Moon is
only an Angular separation: 07°32'12" degree from the magnitude 1.36
bright star Regulus in Leo, see above image. The Moon is visible all night casting
its pale winter light. The February Full Moon is popularly known as the
Full Snow Moon
since the heaviest snow usually falls during this month, native tribes of the north and east most often called February’s full Moon the Full Snow Moon. Some tribes also referred to this Moon as the Full Hunger Moon, since harsh weather conditions in their areas made hunting very difficult.
Courtesy Farmers Almanac.
is very bright at -4.6 magnitude seen after sunset in the western evening sky just
"06°12'28" below and to the right of Mars. Venus is located in the constellation
Pisces "The Fishes".
Venus sets at 9:16pm. Venus is at phase 31.63% and appears as a
small crescent.. The next few weeks Venus phase will become more crescent-shaped as
the apparent diameter grows ever larger. See Venus as seen through
a telescope on February 11th as shown below.
is visible low in the west after sunset located in the constellation
Pisces "The The Fishes". On the evening of the 11th
Mars is "06°12'28" above and to the left of Venus. Mars sets at
9:36 p.m. Mars is
disappointing as seen through a telescope now as the planets disk
size has become smaller due to the increasing distance from Earth.
See below location of Uranus, Mars and Venus at 8:00 pm February
is in the western sky located in the constellation
Pisces "The "Fishes". Uranus can be found with
binoculars at 5. 9 magnitude in a dark clear sky. Uranus sets at
The Winter Circle
is visible this night, can you find it? It is also sometimes called the Winter Hexagon
It is a big circle of bright stars on the dark dome of a winter night. At the center of the Winter
Circle, you’ll find center Orion’s bright red star Betelgeuse. Rigel, Aldebaran, Capella, Procyon, Sirius, Castor and Pollux are the bright stars that make up the large, circular pattern.
The winter circle is asterism. An asterism is a recognizable star pattern.
"The Lion" is above the eastern horizon with the almost
full Moon Moon shining brightly in the middle of Leo. The
constellation Cancer "The Crab" lies just above Leo with
it's pretty open star cluster M-44 also known as the Beehive
winter constellations Orion "The Hunter" and Canis Major
"The Larger Dog" with the brightest star visible in the
northern hemisphere is Sirius. Above Orion the Constellation Gemini the "Twins"
are visible high in the south above and to the left of Orion. Taurus the
"Bull" with its bright red star Aldebaran are visible
high in the southwest sky above and to the right of Orion. About 13 degrees
to the right of Aldebaran is the open star cluster M-45 also known as the
or "Seven Sisters".
in the southwest are the constellations
Cetus the "Whale", Pisces the "Fish". In the
south Eridanus "The River".
Pegasus the "Winged Horse". is very low on the west
northwest horizon. The
constellation Andromeda known as the "Princess of Ethiopia"
is above Pegasus with
its magnificent spiral galaxy M-31 the famous
which is our nearest large neighbor galaxy.
in the northwest lies Perseus the "Rescuer of Andromeda"
with the beautiful Perseus Double Cluster consisting of two
open star cluster NGC 869 & NGC 884. The constellation of Cassiopeia, the
"Queen" is seen in the northwest just to the left and
above the north star Polaris. The Big
Dipper is standing on its handle and is visible low above the northern
horizon as public observing begins.. To the left (west) of the Big Dipper is 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
February 11, 2017, 2017 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