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NGC 2170 and the Monoceros R2 Star Forming Region



Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA Observatory, Shelter Valley, CA,   30 November, 4 December, 2021  Camera: ASI294MM (Baader Ha, RGB filters)

Exposure:  53 x 5 min (2x2 bin, gain 139) Luminance exposures, 32 x 6 min (2x2 bin, gain 200) Ha exposures , 20 x 3 min (2x2 bin, gain 121) each - RGB exposures.

Processing: Data Collection - Sequence Generator Pro (as FITs). Sub frame calibration - Pixinsight. Sub frame registration and integration (Average combine - Winsorized Sigma Clipping) - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight.  Generation of starless nebulosity images (Luminance and Ha) - StarXTerminator. RGB combine, Luminance layering - PixInsight. Stars and Starless  combine - PixInsight. Final finishing - Affinity Photo. RGB photometric calibration - PixInsight.  Annotation - PixInsight, Aladin (Simbad and NED), and Affinity Photo. This  image used a starless luminance and Ha screen blend with a less stretched luminance stack screen blended (for star minimization). The luminance construction was luminance layered with a straight RGB combine. Images processed at 4656 x 3520 resolution. Final Image size is approximately 3804x3595.

North is up in this image. This field is the center portion of the Monoceros R2 star forming region. The four NGC reflection nebulae (from left to right) are NGC 2170, 2182, 2183, and 2185. The six vdB objects are vdb 67, 68, 69, 72, 73, and 74. Some of these vdB objects also coincide with the NGC objects. Prominent dark nebulae around the reflection nebulae and star forming areas are Dobashi 4977, 4978, 4980 and PGCC G214.21-12.42. As a star forming region, many stars are not visible in visual spectrum because they are obscured by interstellar matter and dust. Open cluster MWSC 0771 is seen in the visual spectrum. Three other open clusters can only be seen in the IR spectrum (3.4 micron). The annotated image shows a false color overlay of IR imaging from the WISE survey. The open clusters NGC 2183 Cluster, Mon R2 Stellar Cluster, and MWSC 0732 pop out in the IR overlay.  These objects and some of the brighter stars are identified in the annotated image This image replaces an earlier image that can be accessed in the archives here. Horizontal FOV is about 85 minutes.  Full size image scale is  about 1.34 arcsec/pix. 

Image center is approximately - Equatorial 2000: RA: 06h 09m 08s Dec: -06 28' 55.0'' 


For IR image data in the annotated image: 

"This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration."


All images and content remain the property of Jim Thommes - copyright 2003 - 2021

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