NGC 253 (Sculptor Galaxy, Silver Dollar Galaxy, Caldwell 65)

Telescope: Planewave 17" CDK Reflector, 2912mm FL
Camera: FLI ProLine PL16803, 4096 x 4096 pixels
Exposure: Lum 6 x 2 minutes, RGB 1 x 2 min each on Planewave CDK 20". Registar to align and scale RGB to Luminance, Pixinsight to color calibrate, stretch and process. Photoshop to level.
Location: Siding Springs Observatory, Australia (Elevation 3720')
Image Center (J2000): RA 00h 47m 34s, DEC -25° 16' 22"
Image Size: 25' x 25'

Nearly edge-on intermediate spiral galaxy, mag 8.0, apparent size 27' x 6', one of the brightest spiral galaxies visible. This image shows the galaxy’s weak global spiral pattern, high dust content and distribution of patchy dust clouds and a number of globular cluster candidates. A clear nucleus isn’t discernible. NGC 253 is the brightest galaxy in the Sculptor galaxy group.
Raw data for this image can be downloaded.


NGC 253 (Sculptor Galaxy, Silver Dollar Galaxy, Caldwell 65), Nearly edge-on intermediate spiral galaxy, mag 8.0, apparent size 27' x 6', one of the brightest spiral galaxies visible. This image shows the galaxy’s weak global spiral pattern, high dust content and distribution of patchy dust clouds and a number of globular cluster candidates. A clear nucleus isn’t discernible. NGC 253 is the brightest galaxy in the Sculptor galaxy group.
, acquired with a remote telescope at Siding Springs Observatory, Australia (Elevation 3720')

Object Label Identifier Notes
Galaxy G1 CXO J004702.4-252422 Galaxy seen through a galaxy, mag 18.8. This isn't so rare, you just need to know what look for.
Galaxy G4 GALEXASC J004745.26-252317.0 mR=18.1
Galaxy PGC 198196 PGC 198196 Galaxy mag 16.3, type unclassified
Galaxy PGC 198197 PGC 198197 Galaxies superimposed, see Hubble Image of this superimposed pair
Globular Cluster GC 16 [BS2000] NGC 253 16 Possible Globular Cluster, mB=B 19.00
Globular Cluster GC 29 [BS2000] NGC 253 29 Possible Globular Cluster, mB=19.46
Globular Cluster GC 40 [LA83] NGC 253 40 Possible Globular Cluster, mB=19.3
Globular Cluster GC 5 [BS2000] NGC 253 5 Possible Globular Cluster, mB=18.54
Globular Cluster GC 9 [BS2000] NGC 253 9 Possible Globular Cluster, mB=18.76
Star HD 4572 HD 4572 Star, mV=8.89

Click on the image to display the plate solved image with annotations. This image contains a few dozen galaxies including the chance discovery of two non-related, superimposed galaxies (PGC 198197). The superimposition was discovered accidentally in 2006 during an observation of NGC 253. A few papers have been written on this obscure pair since they offer a unique opportunity to study a galaxy beyond its visible edge. Dimmest stars are about 19th mag. 5' across NGC 253 is about 16,500 light years.