Observation by Alan Thomas: Palomar 15 Globular Cluster in Ophiuchus

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2025 May 05 - 23:37

Uploaded

2025 May 19 - 09:55

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Constellation

Ophiuchus

Field centre

RA: 16^h59^m
Dec: +00°33'
Position angle: +178°09'

Field size

0°31' × 0°31'

Equipment

PlaneWave 24" f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 CCD camera
10Micron GM4000 robotic German equatorial mount

Exposure

90sec.

Location

Observatorio del Teide, Tenerife

Target name

Palomar 15 Globular Cluster in Ophiuchus

Title

Palomar 15 Globular Cluster in Ophiuchus

About this image

By all accounts, Palomar 15 is the most difficult of the Palomar globular clusters to observe. Identification of this faint, diffuse cluster is made more difficult by there only being a handful (less in fact) of reference images. This PIRATE image shows the cluster as a very faint scattering of pin pricks at the centre of the image, but it would be very easy to miss it!

Palomar 15 was discovered by Fritz Zwicky in 1959, and was originally thought to be a dwarf galaxy.

Apparent mag. 14.0. Distance from the Galactic Centre c.123,600ly.

Files associated with this observation

Palomar 15 PIRATE v3image-jpeg-i.jpeg (4.6 MB)

Like this image

Callum Potter, Dominic Ford

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