NEW DISCOVERY: Strottner-Drechsler  99 (StDr 99)

We are pleased to present you today the first ever image of a candidate planetary nebula unknown to this day.
Team members Xavier Strottner and Marcel Drechsler discovered this object in June 2020.
This item has been analysed and added to the StDr catalogue by Pascal Le Dû.
StDr 99 is also registered in the PN Global Base managed by Professor Quentin Parker of the University of Hong Kong.
StDr 99 is located in the constellation Cepheus and has an apparent size of 17 arc minutes.
This nebula is so weak, especially [OIII], that nearly 200 hours of exposure was required.
Many thanks to Sven Eklund for working with me in imaging this challenging object, and to Marcel for processing the image.
TARGET
Nomenclature: StDr 99
Right Ascension: 23:24:01.2
Declination:  +65:26:49.0
Size: 17 arc minutes
EQUIPMENT USED
Twin APM TMB LZOS 152 refractors, Celestron EdgeHd 14"
10Micron GM2000 HPS mount, iOptron CEM120
Twin QSI6120 CCD cameras, ZWO ASI6200M Pro
IMAGE CAPTURE
Blue: 39x300"
Green: 37x300"
Red: 41x300"
Ha: 271x900" bin 1x1
OIII: 217x900" bin 1x1, 774x300" bin 2x2
Total Integration: 196 hours 15 minutes
Pixel scale: 0.530 arcsec/pixel
Field radius: 0.376 degrees
Capture dates: 20 July - 7 August 2022
Capture location:  Fregenal de la Sierra, Spain
IMAGE PROCESSING:
PixInsight and Photoshop
Ha image
OIII Image