M38, or NGC 1912, is an open cluster in Auriga. It
has about 100 stars and is 3.48 kly from us.
The small cluster nearby is NGC 1907.
Hover over the picture for an annotated version
Date: 26 October 2025
FOV: approximately 75' × 50'; the angular size of M38 is 21'
Telescope: Stellarvue SVX102T + SFFX-1 flattener, 739.62mm, f/7.25
(nominally 714mm, f/7)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: ZWO AM5
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 90
Pixel size: 4.78 μm
Resolution: 1.333 arcsec/pixel
Filter: Optolong UV/IR cut
Stacking: sixty-one 300 second frames using PixInsight
Calibration frames: 20 dark, 20 flat, 20 dark flat
Total Time: 5 hours and 5 minutes
Processing: Pixinsight
SPCC, DBE, SPCC, BlurXT, NoiseXT → Linear
HTS, GHS, MStr, PixelMath MStr + GHS + HST → Stars,
Linear, StarXT, HTS, GHS, MStr,
PixelMath MStr + GHS + HST → Starless
PixelMath ~(~Starless_Blend*~Stars) → Final Image
Location: Darling Hill Observatory near Vesper, NY
