The main image presented here is an HOOLRGB composit of the Galaxy M 33 in the constellation Triangulum. The initial intention in taking the image was to show the many emission nebulae of the M 33 galaxy, so wonderful in shape and color. As a special feature and surprising side effect the processing revealed a new discovery - the small round nebula cataloged as
PNG 133.7-31.4 respectively
Maa 2. The Nebula was discovered in October 2022 and has the status "Likely PN" at the moment of this upload. I give it the popular name "Salie's Nebula" as a dedication to our beloved daughter.
The position in the line of sight to M 33 and the quality of the data available so far, together with the complexity of its environment, make the determination of its true nature complicated. A spectroscopy performed by Pascal Le Dû and a review of the available data by Prof. Quentin Parker (HKU) led to the actual classification as "Likely PN". Further analysis is required to change this status.
The Nebula has a diameter of about 28" and is more present in OIII than in Ha while it shows no significant signal in SII. For this reason it presents itself in a HOO composite in greenish hue.
Ha (6 nm):
OIII (3 nm):
Finally I would like to briefly highlight a peculiar nebular structure located in front of or behind at the nearby magnitude 12 star TYC 2293-1266-1. The tiny nebula can be seen in different shapes in Ha (6 an 9 o clock) as well as in OIII (6 o clock).
The data image were acquired with an ASI 2600 mm-pro and a TS Photoline 130/910 mm with TSRED 379 Reducer.
Ch. total single #
Lum 9240s 120s 77
Red 6060s 60s 101
Green 6060s 60s 101
Blue 6120s 60s 102
Ha 8600s 200s 43
OIII 15600s 300s 52
Drizzled with factor 2.
The main image up is 69..9 degrees E of N.
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