Star Chart for Northern AL
|Sun/Moon Data for Northern AL:|
DIY Sunspot Viewer
4% illuminated - Waning Crescent Moon
Moonrise: 05:06 (31/12/1969)
New Moon: 31/12/1969 19:00
Full Moon: 31/12/1969 19:00
The sky is blue because when sunlight collides with our atmosphere, colors of the shortest wavelengths (violet and blue) are scattered - and our eyes are more sensitive to see blue.
|Worse||Better||Best||Sky (including Wind)|
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 Page template and Facts script courtesy of:
Page Template and Moon script courtesy of: