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Star Chart for San Diego CA |
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| Sun/Moon Data for San Diego CA: | |||
Sunspot Activity
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Sunset: 5:39pm Sunrise: 6:23am DIY Sunspot Viewer |
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2% illuminated - New Moon Moonrise: 7:00am (23-Feb-2012) New Moon: Thu, 22-Mar-2012 7:38am PDT Full Moon: Thu, 08-Mar-2012 1:40am PST |
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Space Wx |
Astronomy Fact
When Galileo viewed Saturn for the first time through a telescope, he described the planet as having "ears". It was not until 1655 that Christian Huygens suggested the crazy theory that they might be an enormous set of rings around the planet.
| 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.