Gallery of Digital Astrophotography Back | Up | Next
ATREX Clouds

Clouds from suborbital sounding rockets are seen here, part of the Anomalous Transport Rocket Experiment (ATREX), launched from Wallops Island off the Virginia coast.

The rockets released trimethyl aluminum, a chemical tracer, that turned into milky white luminous clouds, at altitudes of 50 to 90 miles to study the interaction of high altitude winds and complicated electrical current patterns that surround the Earth.

Background star fields include the Milky Way in Scutum, Sagittarius, and Scorpius, and the constellation of Ophiuchus.

Exposure Data
  • Lens: Canon 18-55mm f/3.5 to f/5.6 kit lens
  • F/stop: f/3.5
  • Focal Length: 18mm
  • Exposure: Single 20-second exposures
  • ISO: 3200
  • Mount: Fixed tripod
  • Camera: Modified Canon EOS 550Da (T2i) DSLR
  • Mode: Manual exposure
  • Filter: None
  • White Balance: Custom
  • In-Camera Noise Reduction: Off
  • Conditions: Temp: 35F
  • Date March 27, 2012
  • Time: 5:05 a.m. EDT
  • Location: East Point, NJ
  • Processing JPEG in camera. Resized in Photoshop for web page display.

Back | Up | Next