Sun/Moon Data for Joliet IL
DIY Sunspot Viewer
0% illuminated - New Moon
Moonrise: 7:25am (22-Dec-2014)
New Moon: Wed, 31-Dec-1969 6:00pm CST
Full Moon: Wed, 31-Dec-1969 6:00pm CST
Light from distant stars and galaxies takes so long to reach us, that we are actually seeing objects as they appeared hundreds, thousands or even millions of years ago. So, as we look up at the sky, we are really looking back in time.
Riley Observatory is located in Naperville, IL just north of Joliet. Forecasts courtesy of: ClearSky and 7timer
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Space Track-Satellite Passes
Notes about viewing ESVs:
When using lookangles, choose passes with high magnitudes; less than 6.0. ("Looks" are local time.)
Best viewing is when ESV is in Earth's penumbra; on the map, it's the solid line during night.
Dotted line on map denotes ESV is dark, in Earth's umbra (shadow).
Objects in orbit have to maintain a speed of at least 17,500mph, therefore ESVs traverse the sky noticeably different than aircraft.
ESVs appearing to blink are either tumbling rocket bodies, or spinning payloads with deployed solar arrays.
High-Eccentricity objects have a more ellongated orbit. Ground trace looks like a backwards C.
Regression-Ground traces will move West with each orbit due to Earth's rotation.
Script courtesy of: Lee from Page template and Facts script courtesy of:
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