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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: 7:58pm Sunrise: 5:40am DIY Sunspot Viewer |
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75% illuminated - Waxing Gibbous Moon Moonrise: 4:07pm (19-Jun-2013) New Moon: Mon, 08-Jul-2013 12:15am PDT Full Moon: Sun, 23-Jun-2013 4:33am PDT |
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Graph courtesy: Newquay Weather |
Space Wx |
Astronomy Fact
Shooting stars are usually just tiny dust particles falling through our atmosphere. Comets sometimes pass through Earth’s orbit, leaving trails of dust behind. Then as Earth plows through the dust in its path, the particles heat up, creating the streaks in the night sky.
| 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.