David's Astronomy Pages Images - Session 505 (2012-03-18)

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Images (S506)

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Session Notes

IC 2497 - Spiral Galaxy (attempted imaging of Hanny's Voorwerp)     Photometric Monitoring - Variables - Z And, FS Aur, KR Aur, CV CMi, U Gem, RZ LMi, CZ Ori, FU Ori, DY Per, GK Per, RR Tau, SU Tau, ER UMa     Astrometric Monitoring - Nearby Stars - None

- Evening session (1.7 hrs duration).  - Session operated under semi-automated control, with remote monitoring from indoors computer.   - Ambient Temperature: 0.5°C (minimum)  - CCD operation -30°C (at 65% average cooling).   - main objectives of the session were 1) to acquire images of selected project stars for ongoing photometric and astrometric analysis. 2) acquire an image of Hanny's Voorwrep (Deep Sky Challenge in April 2012 edition of Astronomy Now magazine)  -

IC 2497 - Spiral Galaxy  (attempted imaging of Hanny's Voorwerp)

IC 2497 (Leo Minor) Hanny's Voorwerp - a mag +18 patch of emission just south of IC 2497, discovered  only recently (2007) by Dutch Schoolteacher Hanny van Arkel as part of  the Galaxy Zoo project,  is hardly visible in this image. (Stars slightly elongated due to windshake)

CCD Image (120% size, cropped) 5 x 120 sec exposure (average combine), 3x3 binning, C Filter  2012-03-18 22:00 h UT  (#505030-34) 12" LX200R  (at f/9.7) + ST-10XME

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