O'Neal 9* Asterism in Gemini

Located at: RA 07 hours 40 minutes 58 seconds, Dec +21 degrees 48 minutes 59 seconds

Size: 3.2' Magnitude: 8.0 visual Class: Asterism

North is up

West to the right


 14.5" f5 Newtonian reflector


 ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56


Lumicon Red filter, 480 minutes (48 x 10 minute subs), 02/2/3/2016; seeing 2.4-4.9 per CCDStack


CCDStack 2.90.5589.16047, Photoshop CS5.1


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)


"El Nino" has not materialized (yet) here in Southern California. The first week of February (middle of our rainy season) has been clear, and breezy to windy. Imaged in mostly poor seeing ... this object, and the two planetaries (PK 189+7.1 and PK 184+0.1) I imaged last week, were an experiment. O'Neal 9 was imaged in mostly light wind, but the planetaries all had worst seeing and very breezy conditions. I tried to find high surface-brightness planetaries that would require (many) short individual subs. The short subs should produce smaller star images, and lessen the chance of the gusty winds causing guiding errors.

 * O'Neal 9 was found in Sue French's Deep Sky Wonders column in the March 2016, page 56, issue of Sky & Telescope.