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Michael A. Stecker
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 Simeis-147 (Sh2-240) "Spaghetti Nebula" -- version 3 file: S147-ROO3B-JRFnrflip-2b1sm.jpg This is a collaboration of James Foster and Michael Stecker to photograph the very dim Simeis-147 (Sh2-240) "Spaghetti Nebula" near the Taurus-Auriga border with my Askar 103 APO triplet refractor reduced to f/4 (FL= 420 mm). A ZWO ASI6200MM-Pro full frame monochrome camera was used with filters: 3nm Hydrogen-alpha for 259min, 3 nm Oxygen-III for 651min, and Red-Green and Blue exposures of 28, 32, 28 minutes respectively. The total exposure was 998 minutes (16.63 hours) at Pinon Pines Estates. file: S147-ROO3B-JRFnrflip-2b1sm.jpg Click here for full resolution image . Basic Information Name: Simeis 147, Sharpless 240 (Sh2-240) or "Spaghetti Nebula" Structure type: Supernova remnant Apparent angular diameter: 3-degrees (6 full moons) Actual Diameter: about 160 lightyears Estinated age: 40,000 years Date discovered: 1952 at Crimean Astrophysical Observatory Constellation: Taurus Right ascension: 05h 39m 06s Declination: +27° 59′ 55″ Epoch J2000 Distance from Earth: 3,000 light-years (0.92 kpc) Host: Milky way galaxy ****************************************** Photographic Data Date photographed: early February, 2025 (multiple nights) telescope: Askar 103 APO triplet refractor with 0.6X focal reducer Aperture: 103 mm (4-inch) Focal ratio: f/4 Focal Length: 420 mm mount: iOptron CEM60 Off-axis guiding imaging camera: ZWO ASI6200MM-Pro full frame monochrome astro-camera Near full frame image filters: Astrodon 3 nm Hydrogen-alpha, 3 nm Oxygen-III and Red, Green, Blue Astrodon filters exposures: 259 minutes (37 X 7 min) through a 3 nm Hydrogen-alpha narrow-band filter 651 minutes (93 X 7 min) thropugh a 3 nm Oxygen-III narrow band filter 88 minutes: 28, 32, 28 (one minute each) through Red, Green, Blue filters Total number of exposures: 218 Total exposure time of 998 minutes (16.63 hours) guiding: Off-axis with ZWO ASI120MM Mini guide camera
processing software:
Maxim DL, ASI Studio, Photoshop Elements 2021 photographic site: Pinon Pines Estates (Frazier Park) California (Bortle 4 at 5,500 ft elevation) |
 Simeis-147 (Sh2-240) "Spaghetti Nebula" -- area of interest 1 file: S147-ROO3B-JRFnrflip-2b1-crLLQ2.jpg Click here for full resolution image |
 Simeis-147 (Sh2-240) "Spaghetti Nebula" -- area of interest 2: the "Seagull" file: S147-ROO3B-JRFnrflip-2b1-crSG1.jpg |
 Simeis-147 (Sh2-240) "Spaghetti Nebula" -- original James Foster processed image file: S147-ROO3B-JRForigsm.jpg Click here for full resolution image |
