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Contains:  IC 4628
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            Roberto Colombari


Technical card

Resolution: 9000x5217 job: 1362926

RA center: 254.334 degrees

DEC center: -40.546 degrees

Pixel scale: 0.549 arcsec/pixel

Orientation: 176.206 degrees

Field radius: 0.794 degrees


APOD 09/12/2016

25th APOD


This is a new composition with data from VLT/OmegaCAM (red channel) used as luminance and amateur data, as RGB, that we recorded in Tenerife some months ago with a 350mm F3.3 and FLI ProLine 16803.

R_SDSS OmegaCAM panels: 512

Data: ESO/INAF/DSS-2/R. Colombari/E. Recurt
Assembling and processing: R. Colombari

Explanation: South of Antares, in the tail of the nebula-rich constellation Scorpius, lies emission nebula IC 4628. Nearby hot, massive stars, millions of years young, irradiate the nebula with invisible ultraviolet light, stripping electrons from atoms. The electrons eventually recombine with the atoms to produce the visible nebular glow, dominated by the red emission of hydrogen. At an estimated distance of 6,000 light-years, the region shown is about 250 light-years across, spanning an area equivalent to four full Moons on the sky. The nebula is also cataloged as Gum 56 for Australian astronomer Colin Stanley Gum, but seafood-loving astronomers might know this cosmic cloud as the Prawn Nebula.

Source: APOD



Roberto Colombari
License: None (All rights reserved)

Sky plot

Sky plot




            Roberto Colombari

In these public groups

Imagers of Italy