Padraic M Posted July 30, 2021 Share Posted July 30, 2021 (edited) A clear spell on 23/24/25 July gave an opportunity to capture a mosaic of a very rich area of Cassiopeia. This is a 2x1 panel mosaic in HaRGB which includes the following objects: - Messier 52 Salt and Pepper Nebula, an open cluster discovered by Charles Messier on 1774. - Caldwell 11 Bubble Nebula, an emission nebula surrounding a mag 8.7 star, which while it looks like a planetary nebula is actually a bubble blown by the star's stellar winds in the surrounding gas cloud. The bubble is 6 light years in diameter, and is at a distance of approximately 7,000 light years. It was discovered by William Herschel in 1787. - Nova Cassiopeiae 2021, first eruption identified on 18th March and a number of flare-ups observed since. Imaged at mag 6.9 here and has since faded to mag 7.12. - NGC7538 Northern Lagoon Nebula - Sharpless 2-157 Lobster Claw Nebula, emission nebula, which contains: - -- Markarian 50 open star cluster - -- Lynds' Bright Nebula (LBN) 537, from a catalog of bright nebulae compiled by Beverly Turner Lynds, a Professor of Astronomy at the University of Arizona, from a study of the red and blue prints of the National Geographic-Palomar Observatory Sky Atlas, and pubished in the Astrophysical Journal Supplement, vol. 12, p.163, 1965. - -- Planetary Nebula PLN 110-0.1 (also WeSb 6 from the Galactic Planetary Nebulae catalog) - NGC 7510 Dormouse cluster in Cepheus - IC1470 H ii ionized region (emission nebula). "IC 1470 has a nebular spectrum similar to M8 and appears to be an H ii region excited by a single 07 star. It represents an object formed close to the edge of a molecular cloud, and its ionizing radiation is penetrating the intercloud gas, producing a “blister” on its edge." (Lynds, B. T. ; Oneil, E. J., Jr., An optical study of IC 1470, Astrophysical Journal, Vol. 265, p. 803-807 (1983)) The image is processed HaRGB, and comprises two panels. Panel 1: Red 9x300, 2x600 Green 9x300, 2x600 Blue 9x300, 2x600 Ha 12x300 Panel 2: Red 9x300 Green 9x300 Blue 9x300 Ha 9x300 Total integration 7hrs 40mins, Bortle 2. Equipment Imaging: SW Esprit 80; ZWO ASI1600mm Pro @ -20c gain 139 offset 21; Baader RGB and 3.5nm Ha filters. Capture controlled by NINA. Guiding: AA Starwave 50mm; ZWO ASI290mm Mini; PHD2 HEQ5 Pro belt mod; Sesto Senso 2 focuser; ZWO EFW Mini. Processed with Astro Pixel Processor, Gimp, Noise Ninja. High resolution on Astrobin. Annotated: Edited July 30, 2021 by Padraic M 6 Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted July 31, 2021 Share Posted July 31, 2021 Fantastic image Padraic. It’s only when you see all the familiar objects put together in a large detailed image that you appreciate the vast size of the targets. 1 Quote Link to comment Share on other sites More sharing options...
Padraic M Posted July 31, 2021 Author Share Posted July 31, 2021 Thanks Terry, there's lots of scope for future work in this area! Quote Link to comment Share on other sites More sharing options...
MarkAR Posted July 31, 2021 Share Posted July 31, 2021 Nicely done, it's quite a busy part of the sky. 1 Quote Link to comment Share on other sites More sharing options...
Padraic M Posted July 31, 2021 Author Share Posted July 31, 2021 Thanks Mark! Plenty to study. Quote Link to comment Share on other sites More sharing options...
peter shah Posted July 31, 2021 Share Posted July 31, 2021 super job Padraic love the FOV 1 Quote Link to comment Share on other sites More sharing options...
Padraic M Posted July 31, 2021 Author Share Posted July 31, 2021 Thanks Peter! My first mosaic, but APP does a fantastic job with them. Quote Link to comment Share on other sites More sharing options...
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