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Severe Wx Summary! | ||||||
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Mon, Oct. 2, 2023-11:26:46pm
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Mon, Oct 2, 2023 - 11:31pm |
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Info Links
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Star Chart for Northern California | ![]() |
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Star Chart courtesy: AstroViewer | Monthly SkyMap |
Sun/Moon Data for Foresthill California: | |||
Sunspot Activity![]() |
Astronomical Twilight starts: Nautical Twilight starts: Dawn starts: 6:33am Sunrise: 7:05am Transit: 12:57pm Sunset: 6:49pm Dusk ends: 7:13pm Nautical Twilight ends: Astronomical Twilight ends: DIY Sunspot Viewer |
81% ![]() |
Waning Gibbous Transit: ------- Moonset: 10:48am Moonrise: 8:47pm Last Quarter ( Oct-06 ) New Moon ( Oct-14 ) First Quarter ( Oct-21 ) Full Moon ( Oct-28 ) |
Space Wx![]() |
Astronomy Fact
Every year the sun evaporates 100,000 cubic miles of water from Earth (that weighs 400 trillion tonnes!)

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.
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