Simeis 147 ( Sh2-240) and Sh2-242 in Auriga

© Velimir Popov & Emil Ivanov 2020
Size: 1800 px
Simeis 147, also known as the Spaghetti Nebula, Sharpless 2-240, or SNR G180.0-01.7 is a supernova remnant (SNR), situated on the border between the constellations Auriga and Taurus. It was discovered in 1952 at the Crimean Astrophysical Observatory using a 25-inch Schmidt-Cassegrain telescope. This object is difficult to observe due to its extremely low brightness. Photography is also a challenge, because a very long exposure times are needed. In case of this image they were 3,120‬ minutes, or 52 hours. Using different narrowband filters, can be revealed its filamentary structure. The remnant has an apparent diameter of approximately 3 degrees, an estimated distance of approximately 3000 (±350) light-years. Its age is estimated to be about 40,000 years. It is believed that after its stellar explosion a rapidly spinning neutron star known as pulsar PSR J0538+2817 was left behind in the nebula core, emitting a strong radio signal. The small nebula at the top right is Sh2-242.

Image details:


Center of field RA 05:41:28 (h:m:s)
Center of field DE +27:58:52 (deg:m:s)
Size 4.71 x 3.79 (deg)
Pixel scale: 9.41 (arcsec/pixel)
Orientation: Up is 191 degrees E of N
Charts and image details obtained from
Optic(s): Canon 300mm lenses @ F/2.8
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters; Ha, OIII Baader filters
Dates/Times: Nov-Dec. 2010
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: L:12x10min;R:6x10 min, G:6x10 min, B:6x10 min;Ha:32x30 min;SII:32x30 min;OIII:32x30 min; Bin 1 Total exp.time: 3120min. (52 hrs)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2020. All Rights Reserved
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