Congratulations to Bryan Lawrence for his excellent image of LBN 576 the Garlic Bulb Nebula in Cassiopeia. This was chosen as winner by David Brett at our meeting on Friday.
He says:
Telescope : Stellamira EDT 90 (f/l 540mm)
Camera : ZWO ASI2600MM-Pro
Filter : Antlia 3nm Ha
Exposures : 72 x 300s (6hrs)
Dates : 6/7th April 2025
Integrated AstroPixel Processor
Processed : Pixinsight
This is LBN 576 (also known as CTB 1 and by many other names such as the Garlic Bulb Nebula). CTB-1 is the expanding gas shell that was left when a massive star toward the constellation of Cassiopeia exploded about 10,000 years ago. It had originally thought to be a planetary nebula but recent studies have confirmed it to be supernova remnant. It is located some 13,700 light years from earth. There is also considerable research taken place to identify the pulsar that formed after the super nova event, it was discovered that the pulsar is rapidly moving away from the site of the original supernova at speeds estimated between 1000-1500km/s, however recent study brings the estimated speed down to 510km/s , so still a ‘fast moving’ pulsar.