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Click here for a 200% crop  showing the planetary nebula PNG 3.9+1.6 which is approximately at 5 o'clock from Terzan 5


Catalogue and alternative designations

 Terzan 5

Type Globular Cluster
Position 17 48 05, -24 46 48
Constellation Sagittarius
Camera and Telescope STXL6303E and 36.8 cm Ritchey Chretien
Focal Ratio F9
Exposure Details LRGB exposure with the luminance a combination of standard luminance (80 minutes) and near infrared luminance (greater than 700nm).  The NIR luminance was 150 minutes.  R=G=B=90 minutes. All exposures were 1x1 and Astrodon series 2 filters were used.
Description Terzan 5 is one of the brighter Terzan globular clusters, a group of heavily obscured globular clusters discovered by Agop Terzan in 1968. They are extremely reddened and best studied in the infrared.  Once thought to be totally impossible for amateur observers, most of them have now been visually observed.  Terzan 5 has an apparent magnitude of 12.8 and is approximately 1' in diamete.