NGC 5904 or Messier 5 in Serpens

NGC 5904, M5, is a globular cluster with wide spaced

arcs of stars located in the constellation Serpens.

It contains 100 000 stars and

is 24.5 kly from us.

Hover over the picture for an annotated version

Date:  4 June 2024

FOV:  cropped to 60' × 40'; the angular size of M5 is about 23'

Telescope:  Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)

Guiding:  ZWO ASI120MM mini mono guide camera,

ZWO 30F4 30mm mini guide scope

Computer:  ASIair pro Raspberry Pi

Mount:  ZWO AM5 mount

Camera:  ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS with gain 100

Pixel size:  3.76 μm

Resolution:  1.051 arcsec/pixel

Filter:  none

Stacking:  seventy-three 240 second frames

with 20 dark flats, darks, and flats preprocessed in Pixinsight

Total Time:  4 hours 52 minutes

Processing:  Pixinsight – SPCC, DBE, SPCC, DynCrop, BlurXT, NoiseXT + Mask,

Mask + NoiseXT, HST, GHS, MStr, PMath MStr + GHS + HST → PM,

Mask + Halo reduction on 5 Ser, Sat, Scale

Location:  June 4 Darling Hill Observatory near Vesper, NY