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Posts Made By: Dave Erickson

October 30, 2010 04:17 PM Forum: Home Observatories


Posted By Dave Erickson

Anyone have experience with RoboDome from Technical Innovations?

Dave Erickson

June 17, 2012 01:43 PM Forum: CCD Imaging and Processing/Deep Sky

First Light Sierra Chaparral

Posted By Dave Erickson

First light image of the NGC7000 region. Imaging was completely remote controlled 220 miles from the telescope and observatory site. 8" F/2.6 home made astrograph STL 1100M HAlpha filter (3) 10 min sub frames.

June 27, 2012 08:48 PM Forum: CCD Imaging and Processing/Deep Sky

HAlpha M8 M20 last night

Posted By Dave Erickson

M8 M20 Halpha with M21 Last night

13nm HAlpha filter
(15) 5 min subframes
8" F/2.6
automated remote data collection
Sierra Chaparral

June 29, 2012 08:07 PM Forum: CCD Imaging and Processing/Deep Sky


Posted By Dave Erickson

Here is a color image of the Lagoon and Triffid nebula taken by remote control from Sierra Chaparral Observatory 8" F/2.6 on AP1200 mount, STL-11000M RGB ((4)RG 2-min subs, B 3-min subs) HAlpha ((8)5min subs) 68 min total exposure time. Sky quality 21.7 seeing 1.7 arc sec.

July 3, 2012 06:33 PM Forum: CCD Imaging and Processing/Deep Sky

M9-NGC6333 and NGC 6342 area with dark nebula

Posted By Dave Erickson

Image of M9 and NGC6342 both Globular clusters taken June 24. Frame is adjusted to include a dark nebula(3) 5min subs for RGB total 45min. 8" F/2.6 STL 11000M Sky Quality 21.8mag/arc sec and seeing 1.5 arc seconds

August 7, 2012 02:59 AM Forum: CCD Imaging and Processing/Deep Sky

Heart Soul Double Cluster Mosaic HAlpha 13nm

Posted By Dave Erickson

Here is a 13nm HAlpha (6) pane mosaic of the Heart, Soul, Double Cluster area. (3) 5 min subs for each pane. 8" F/2.6 remote over 6 nights July 23 to 28. Seeing typical 1.7 arc seconds Sky Quality typical 21.7.

September 18, 2012 04:42 PM Forum: CCD Imaging and Processing/Deep Sky


Posted By Dave Erickson

Here is a H alpha image of SH2-171 a.k.a Cederblad 214 in Cepheus Taken 9-15-2012 Sierra Chaparral using the 8" F/2.6 STL11000M (14) 5min subs. Seeing 1.5arc seconds and SQ 21.8mag/arcsec.

September 21, 2012 09:18 PM Forum: CCD Imaging and Processing/Deep Sky

NGC1499 California Nebula

Posted By Dave Erickson

NGC 1499 (2) pane mosaic California Nebula (24) 5 min each pane (4) hours total exposure over several nights in August by remote control, from Sierra Chaparral Observatory 8" F/2.6. Average Seeing 1.8 arc second Average Sky Quality 21.78 mag/ arc sec...

October 2, 2012 03:28 PM Forum: Telescope Making

Fast astrographs design references desired

Posted By Dave Erickson

Does anyone have a reference for fast astrograph designs? Faster than F/3 for a 16803 CCD at between 40” and 60” focal length… I am considering making a larger astrograph…

November 14, 2012 02:13 PM Forum: CCD Imaging and Processing/Deep Sky

Great Orion Nebula area HAlpha

Posted By Dave Erickson

On a cold autmn night I thought I'd visit an old friend... Here is a wide field shot of the Great Orion Nebula area taken the other night with an 8" F/2.6 astrograph under dark skies at Sierra Chaparral Observatory. Seeing 1.5 arc seconds sky quality 21.8 mag/ arc sec. An halpha 13nm filter was used during (3) 12 min subframes for a total 36 min exposure, using a STIL 11000M sensor. The entire frame is displayed here.

Just a non linear screen stretch was used to preserve the subtle delicate nature of the nebula. I have additional data including short exposures I'll combine later for more depth and dynamic range.