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Star Chart for Northeast WI |
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| Sun/Moon Data for Northeast WI: | |||
Sunspot Activity
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Sunset: 8:19pm Sunrise: 5:38am DIY Sunspot Viewer |
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53% illuminated - Waning Gibbous Moon Moonrise: 11:51pm (07-30-2021) New Moon: Sun, 08-Aug-2021 8:51am CDT Full Moon: Fri, 23-Jul-2021 9:37pm CDT |
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Graph courtesy: Newquay Weather |
Space Wx
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Astronomy Fact
Its estimated that the number of stars in the universe is greater than the number of grains of sand on all the beaches in the world! On a clear night, we can see the equivalent of a handful of sand.
| 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. Page template and Facts script courtesy of: TNET Weather.
Page Template and Moon script courtesy of: Saratoga Weather. Graph base code courtesy of: jpGraph.
