Observation by Alan Thomas: Palomar 9/NGC 6717 Globular Cluster in S...

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2025 May 04 - 03:12

Uploaded

2025 May 05 - 14:47

Objects

NGC6717

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Constellation

Sagittarius

Field centre

RA: 18^h55^m
Dec: -22°43'
Position angle: +178°15'

Field size

0°32' × 0°32'

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 9/NGC 6717 Globular Cluster in Sagittarius

Title

Palomar 9/NGC 6717 Globular Cluster in Sagittarius

About this image

Palomar 9 is reputedly the easiest of the Palomar clusters to observe, being relatively bright and close to a mag. 5.0 star, v2 Sagittarii.

It was discovered by William Herschel in August 1784.

This PIRATE image shows the cluster just above v2 Sgr. About half a dozen brighter (foreground?) stars are seen in front of a haze of tiny, fainter stars in a loosely circular shape.

Distance from the Galactic Centre: c.7,800ly. Mag. 9.28. Age: c.12billion yrs. - which is rather old!

Files associated with this observation

Palomar 9 PIRATE v3image-jpeg-i.jpeg (2.1 MB)

Like this image

Andy Wilson, Callum Potter, Dominic Ford

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