- R15 minutes (15 frames)
- L15 minutes (15 frames)
- B15 minutes (15 frames)
- G15 minutes (15 frames)
Globular cluster M5 (also designated NGC 5904) is one of the brightest and oldest objects in the constellation Serpens. It was discovered in 1702 by the German astronomer Gottfried Kirch while observing a comet and included in the Messier catalog in 1764.
M5 is located approximately 24,500 light-years from Earth and has a diameter of about 165 light-years. It contains over 100,000 stars, mostly red dwarfs and red giants. Despite its advanced age, M5 continues to form new stars, although at a very slow rate.
The cluster is known for its high density: the stars are located very close to each other, creating a visual merger effect that makes the object especially spectacular. M5 can be observed even with the naked eye in very good conditions, and in binoculars or a small telescope it looks like a dim "nebula". When using larger telescopes, it is possible to see individual stars, the brightest of which have an apparent magnitude of up to 10.6.
A special feature of M5 are variable stars. In the cluster, 105 variables are known, of which 97 belong to the RR Lyrae type. These stars help to measure distances in space due to the well-studied relationship between their luminosity and periods of change. One of the brightest variable stars M5 changes its brightness from 10.6 to 12.1 stellar magnitude with a period of 26.5 days.
In the cluster, two millisecond pulsars have also been discovered, one of which is in a binary system. This allows the proper motion of the cluster to be measured, and the binary system may provide additional information about the neutron star matter. M5 has been used to test hypotheses about the magnetic dipole moments of neutrinos, which may help in the study of hypothetical particles such as axions. M5 remains a popular target for amateur astronomers due to its brightness, relative accessibility, and wealth of interesting objects to study.
| Photo | Date | Frames | Exposure | L | R | G | B |
|---|---|---|---|---|---|---|---|
 | 06 Aug 2021 | 60 | 01:00 | 00:15 | 00:15 | 00:15 | 00:15 |
Visibility chart of Globular cluster M 5 during the day
| Date | Moon Phase | Exposure | CCD Temperature | Gain | Offset | Filter |
|---|---|---|---|---|---|---|
- 2023ixf•
- 40 Eri•
- Abell 74•
- Artemis A868 SA•
- a Canis Minoris•
- C 2020 R4 ATLAS•
- C 2020 T2 Palomar•
- C 2021 S3 (PANSTARRS)•
- Haumea (2003 EL61)•
- HCG 68•
- HCG 92•
- IC 1318B•
- IC 1396•
- IC 1795•
- IC 1805•
- IC 1848•
- IC 1871•
- IC 3322A•
- IC 342•
- IC 4015•
- IC 405•
- IC 417•
- IC 434•
- IC 443•
- IC 4703•
- IC 5070•
- IC 5146•
- IC 63•
- M 1•
- M 101•
- M 103•
- M 109•
- M 13•
- M 15•
- M 27•
- M 3•
- M 33•
- M 42•
- M 45•
- M 5•
- M 51•
- M 57•
- M 63•
- M 64•
- M 74•
- M 76•
- M 81•
- M 82•
- M 86•
- M 87•
- M 94•
- M 97•
- NGC 147•
- NGC 1491•
- NGC 1499•
- NGC 1579•
- NGC 1961•
- NGC 2146•
- NGC 2239•
- NGC 2403•
- NGC 281•
- NGC 4236•
- NGC 4565•
- NGC 4631•
- NGC 507•
- NGC 508•
- NGC 5866•
- NGC 5907•
- NGC 6503•
- NGC 6823•
- NGC 6888•
- NGC 6946•
- NGC 6992•
- NGC 6995•
- NGC 7000•
- NGC 7023•
- NGC 7129•
- NGC 7217•
- NGC 7331•
- NGC 7380•
- NGC 7538•
- NGC 7635•
- NGC 7640•
- NGC 7822•
- NGC 891•
- NGC 896•
- NGC 925•
- PGC 54559•
- Sh2-155•
- Sh2-168•
- Sh2 103•
- Sh2 109•
- Sh2 132•
- T CrB•
- UGC 6930•
- V1405 Cas•
- Vesta A807 FA•