|Meteor Showers||Star Chart for Joliet, IL|
|Sun/Moon Data for Joliet, IL:|
DIY Sunspot Viewer
10% illuminated - Waxing Crescent Moon
Moonrise: 8:41am (29-Apr-2017)
New Moon: Thu, 25-May-2017 2:45pm CDT
Full Moon: Wed, 10-May-2017 4:43pm CDT
Half-a-billionth of the energy released by the sun reaches the Earth.
ClearSky and 7timer
|Worse||Better||Best||Sky (including Wind)|
Space Track-Satellite Passes
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.