Graff's Cluster (IC4756)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 24 arcminutes across.
Finder chart
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From Cambridge , Graff's Cluster is difficult to observe as it will appear no higher than 19° above the horizon. It will become visible at around 17:24 (EST), 19° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 3 hours and 3 minutes after the Sun at 19:14.
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Name
Graff's Cluster (IC4756)
|
Object type
Open cluster
|
Position
| Right ascension: | 18h38m [2] |
| Declination: | +05°27' [2] |
| Constellation: | Serpens Cauda |
| Magnitude: | 4.60 (V) [4] 4.96 (B) [2] |
| Distance: | 484.0 parsec 1577.8 lightyrs [1] |
| B-V Color (mag): | 0.36 |
Derived quantities
| Absolute mag (V): | -3.82 |
Sources
Visibility from Cambridge
All times shown in Cambridge local time.
Events
| 01 Jul 2025 | – The cluster IC 4756 is well placed |
| 01 Jul 2026 | – The cluster IC 4756 is well placed |
| 02 Jul 2027 | – The cluster IC 4756 is well placed |
| 01 Jul 2028 | – The cluster IC 4756 is well placed |
| 01 Jul 2029 | – The cluster IC 4756 is well placed |
| 01 Jul 2030 | – The cluster IC 4756 is well placed |
| 02 Jul 2031 | – The cluster IC 4756 is well placed |
| 01 Jul 2032 | – The cluster IC 4756 is well placed |