Hemisphere:  Northern  ·  Constellation: Orion (Ori)  ·  Contains:  67 nu. Ori  ·  69 f01 Ori  ·  Sh2-261  ·  The star 69Ori  ·  The star νOri
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Sharpless 261 - Lower's Nebula, 



    
        

            Timothy Martin & Nic Patridge
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Sharpless 261 - Lower's Nebula

Getting plate-solving status, please wait...
Sharpless 261 - Lower's Nebula, 



    
        

            Timothy Martin & Nic Patridge
Powered byPixInsight

Sharpless 261 - Lower's Nebula

Imaging telescopes or lenses: William Optics Z61II APO

Imaging cameras: ZWO ASI294MC Pro II

Mounts: iOptron CEM25EC

Guiding telescopes or lenses: William Optics 50/200 Guidescope

Guiding cameras: ZWO ASI290MM Mini

Focal reducers: William Optics Flat61a Flattener

Software: Topaz Labs DenoiseAI  ·  Nighttime Imaging 'N' Astronomy N.I.N.A. 1.10  ·  Aries Productions Astro Pixel Precessor v1.082  ·  Open PHD Guiding PHD2 2.6.9  ·  Pixinsight 1.8  ·  Topaz Labs Topaz Studio II  ·  Adobe Photoshop CC 2020

Filters: Triad Ultra Quad-Band Narrowband Filter Ultra Quad-Band Narrowband Filter

Accessory: Pegasus Astro Powerbox Advanced


Dates:Nov. 19, 2020

Frames:Triad Ultra Quad-Band Narrowband Filter Ultra Quad-Band Narrowband Filter: 24x300" (2h) (gain: 200.00) -8C bin 1x1

Integration: 2h

Darks: ~30

Flats: ~50

Flat darks: ~50

Avg. Moon age: 4.73 days

Avg. Moon phase: 23.29%


Astrometry.net job: 4158270

RA center: 6h 8' 40"

DEC center: +15° 40' 1"

Pixel scale: 2.155 arcsec/pixel

Orientation: -3.661 degrees

Field radius: 1.761 degrees


Resolution: 4867x3298

Locations: Big Bend Ranch State Park, Terlingua, Texas, United States

Data source: Traveller

Description

This is Lower's Nebula, designated Sharpless 261, and named after Harold and his son Charles Lower who discovered it in 1939. This emission nebula doesn't get a lot of love in the astronomical community, but it's quite an interesting formation. Located between the Perseus and Orion constellations about 3,200 light years away, this thing is pretty large. It is approximately 30 light years in diameter and has an apparent size in the sky about twice that of the full moon. Its relative faintness at mag 10.0 and proximity to the popular formations in Orion may account for why it is so consistently ignored. But the Accidental Astronomers are all about finding things no one else cares about. 😉

I shot this in Big Bend in November with the small William Optics 61mm refractor--another testament to what a good, small telescope can do. I intend to pursue a closer study of portions of this region with the C11 at some point. My wife refers to this one as "Pinky *in* the Brain."

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Sharpless 261 - Lower's Nebula, 



    
        

            Timothy Martin & Nic Patridge