2003 0721 DPk Note
Don PARKER's Images on 21 July 2003
at 07:50~ 08:09 GMT

  λ=226°Ls,   (ω=066°, 070°W,   φ=20°S),   δ=20.4",   ι (phase angle)=29°

Seeing good (8, Pickering). Transparency 4.5-5.0 m. No wind. Light dew. Altitude = 51°.

SPC mottled and has irregular edge in red light. NP Hood bright. Minimal Cloud activity. Violet Clearing = 0.
Small, dark nucleii in Solis Lacus. Numerous "canals" in Thaumasia also breaking up into dark nucleii.

PARKER uses a 41 cm Newtonian working at f/55 with an eyepiece projection together with an SBIG ST9XE ccd camera, equipped with a CFW-8C filter wheel and RGB interference filters

Integration times:
  Red      (610 -1100nm) : 0.12s   1 image   (RG610, NO IR ejection)
  Green   (488 - 574nm) :  0.32s   9 images
  Blue      (392 - 508nm) : 0.99s   7-10 images
Images bias, flat and dark corrected.

Observer: Donald C PARKER, Coral Gables,  FL.  USA

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