Star Charts -
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Star Chart for Central AR |  |
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| Sun/Moon Data for Central AR: | |||
Sunspot Activity
Space Weather |
Sunset: 8:08pm Sunrise: 6:04am DIY Sunspot Viewer |
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7% illuminated - Waning Crescent Moon Moonrise: 4:29am (18-May-2012) New Moon: Sun, 20-May-2012 6:48pm CDT Full Moon: Sat, 05-May-2012 10:36pm CDT |
Astronomy Fact
Scientists believe that we can only see about 5% of the matter in the Universe. The rest is made up of invisible matter (called Dark Matter) and a mysterious form of energy known as Dark Energy.
| Color Key |
| Worse | Better | Best | Sky (including Wind) | ||||||||||
| Worse | Best | Worse | Ground |
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 MadALwx.
