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Contains:  11 Sgr, B302, B303, B91, IC 1274, IC 1275, IC 4685, IC1274, IC1275, IC4685, NGC 6559, NGC6559, PK006-02.1, Sh2-29, Sh2-31, Sh2-32, The star 11Sgr
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IC 4685 Catcher's Mitt Nebula,  IC 1274, IC 1275, NGC 6559, 


            Jerry Macon
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IC 4685 Catcher's Mitt Nebula, IC 1274, IC 1275, NGC 6559

Technical card

Dates:May 30, 2019

Astrodon Gen 2 L 36mm: 148x100" (gain: 99.00) -15C bin 1x1
Astrodon Gen 2 RGB 36mm: 84x100" (gain: 99.00) -20C bin 1x1

Integration: 6.4 hours

Avg. Moon age: 25.61 days

Avg. Moon phase: 16.39%

Bortle Dark-Sky Scale: 4.00

Temperature: 10.00 job: 2730584

RA center: 18h 9' 49"

DEC center: -23° 52' 37"

Pixel scale: 0.701 arcsec/pixel

Orientation: 2.172 degrees

Field radius: 0.568 degrees

Resolution: 4656x3520

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Images from the following two scopes (piggybacked) contributed to this image:
AG12+ASI1600MM at .70 asec/pix
TV127is+ASI183MM at .75 asec/pix.
They were all registered to the best R image taken on the AG12.
Using L from the TV NP127is refractor effectively eliminates the spikes from the AG12.

About 1.25 deg. northeast of M8 (Lagoon Nebula) in the constellation of Sagittarius about 4,000 light years distant, lies a complex emission/reflection region dominated by IC 4685; The bright, bulbous emission regions toward the top of the image are IC 1274 and IC 1275, and between those is the dark cloud (B91).



Jerry Macon
License: Attribution Creative Commons

Sky plot

Sky plot


IC 4685 Catcher's Mitt Nebula,  IC 1274, IC 1275, NGC 6559, 


            Jerry Macon