David's Astronomy Pages CCD Images - Session 455 (2011-02-12)

Images (S454)

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Images (S456)

Objects	Session Notes
NGC 470 & NGC 474 - Spiral Galaxies (ARP 227) Variable Stars Photometric Monitoring - Variables - FO And, RX And, Z And, S Cyg, SS Cyg, BL Lac, CZ Ori - SZ Lyn attempt (aborted) Astrometric Monitoring - Nearby Stars - EV Lac	- Early evening  session (1.4 hrs), ending when wind and cloud developed - Session operated under semi-automated control, with remote monitoring from indoors computer.  - Ambient Temperature: +2.0 deg C  (minimum) - CCD operation -25 degC (at 62% average cooling).   - main objectives of the session was to acquire images of selected project stars for ongoing photometric analysis.

NGC 470 & NGC 474 - Spiral Galaxies (ARP 227)

NGC 470 & NGC 474 / ARP 227  (Pisces) faint circular concentric rings around NGC 474  are not visible in this image.

Annotated CCD Image (50% size) 3 x 120sec exposure (average combine),  3x3 binning, C Filter 2011-02-12 18:58 h UT  (#455036-38) 12" LX200R  (at f/9.7) + ST-10XME

NGC 470,  Spiral Galaxy - detail

CCD Image (100% size, cropped) Image details as above

NGC 474 -  detail faint circular concentric rings around NGC 474  are not visible in this image

CCD Image (100% size, cropped) Image details as above

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Variable Stars

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