Good morning. It’s November 10, and in the present day’s picture reveals a faint supernova.
It has the formal identify CTB-1, and after its discovery within the Nineteen Fifties, it was regarded as a planetary nebula. (Regular readers will recall that planetary nebulae turned out to not have something to do with planets.) CTB, in case you had been questioning, stands for “Cal Tech Observatory catalog B.”
The object has since been acknowledged because the remnant of a supernova that’s about 10,000 years outdated and is understood colloquially because the “Garlic Nebula.” The cause must be pretty apparent. It additionally occurs to be a troublesome astronomical object to {photograph}, which is why I believe in the present day’s submission from Ken Bates is so nice.
“It is a particularly faint object, and with out narrowband filters, it’s virtually inconceivable to {photograph},” Bates informed me. Narrowband filters seize particular wavelengths of mild. “Narrowband photographs very often end in magenta stars, and since I don’t actually care for the way that appears, I took extra exposures for about 2.5 hours in extensive band utilizing RGB filters. I eliminated the celebrities from the narrowband picture, then extracted the celebrities from the RGB picture, color-calibrated them utilizing knowledge from the GAIA satellite tv for pc database, after which merged the color-calibrated stars into the narrowband picture to offer this end result.”
The picture itself consists of about 51.5 hours of whole publicity time taken over a two-week interval in late September and early October. Bates shot the Garlic nebula from his driveway within the Black Forest north of Colorado Springs.
Source: Ken Bates.
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