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Jon Greif

Location of Photo:

La Jolla, CA, USA

Date/Time of photo:

February 6-8, 2023, between 9 pm and 3 am PST


Takahashi FSQ-85ED with 1.01x flattener/reducer. ZWO ASI533MC Pro imaging camera. Optolong L-Pro filter. Rainbow Astro RST-135 Mount. ZWO 30mm Mini Guide Scope with ZWO ASI290 Mini guide camera. ASIAIR Plus controller. Processed in Pixinsight 1.8.9.


This is the faint emission nebula IC 410, the Tadpole Nebula. Partly obscured by foreground dust, the nebula itself surrounds NGC 1893, a young galactic cluster of stars, formed a mere 4 million years ago, the intensely hot, bright cluster of stars energize the glowing gas. Composed of denser cooler gas and dust, the tadpoles are around 10 light-years long and are likely sites of ongoing star formation. Sculpted by winds and radiation from the cluster stars, their heads are outlined by bright ridges of ionized gas while their tails trail away from the cluster's central region. IC 410 lies some 10,000 light-years away, toward the nebula-rich constellation Auriga. The image is a stack of 93 five minute exposures taken from our deck in La Jolla over two nights -- a triumph of telescope over city lights, a new bright street lamp and a near full moon! 7.75 Hours Integration Time, Bortle 7, Waning Gibbous moon.