Collinder 399 – Brocchi’s Cluster
Collinder 399 – Brocchi’s Cluster
Collinder 399 (also known as Brocchi’s Cluster) is pretty unusual. 6 bright stars appear in a row with three below. Most of the bright blue stars are type A stars while the lower 2 are a M type star and a K type star. I was able to capture a bit of Spectra from them as well , across HIP95560, HIP95582 and HIP95498. Several dark nebulae sit in the surrounding area as well.
Location
Location: ASG Observatory, Pendleton, OR
Bortle: 4
Shoot Parameters
Date: June, 2025
R: 60 x 180 seconds
G: 60 x 180 seconds
B: 60 x 180 seconds
Total Integration time ~9 hrs
Calibration Bias: 20
Calibration Dark: 20
Calibration Flats: 20 each filter
Gain: 100
Cooling: -10
Processing Software: Captured with NINA, Stacked with Astro Pixel Processor, Processed in PixInsight
