NGC 5139 (Omega Centauri)

Telescope: Takahashi FSQ 106mm Refractor, 530mm FL
Camera: FLI ProLine PL16803, 4096 x 4096 pixels
Exposure: Lum:7x2 minutes. Processed with PixInsight.
Location: Siding Springs Observatory, Australia (Elevation 3720')
Image Center (J2000): RA 13h 26m 45s, Dec -47° 28' 39"
Image Size: 128' x 128'

Largest known globular cluster in the Milky Way. Omega Centauri is bright enough to have been discovered in 150 AD. RR Lyrae variable stars, common to Globular Clusters, have be used to estimate the cluster's distance. All RR Lyrae variables further than 8' from the core can be identified in this image. Harvard University astronomer Bart Bok once said “All the good stuff is in the southern hemisphere”. Image size is 140' x 140'.


NGC 5139 (Omega Centauri), Largest known globular cluster in the Milky Way. Omega Centauri is bright enough to have been discovered in 150 AD. RR Lyrae variable stars, common to Globular Clusters, have be used to estimate the cluster's distance. 
All RR Lyrae variables further than 8' from the core can be identified in this image.  
Harvard University astronomer Bart Bok once said “All the good stuff is in the southern hemisphere”.
Image size is 140' x 140'., acquired with a remote telescope at Siding Springs Observatory, Australia (Elevation 3720')

Object Label Identifier Notes
RR Lyrae variable RR Lyrae variables first cataloged in 1902. 7 are marked.

Click on the plate solved image to display annotations. 20' across NGC 5139 is about 92 light years.