M55 Observation Details
M55 Daily Motion
M55 will be visible until January, 1, when it will move too close to the Sun. During this time, its proximity to the Sun will cause it to disappear from the night sky, making it unobservable for a while.
M55 Visibility Timetable on June 05
M55 Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 65.7% illuminated | 14:52 | -70° |
| Astrosession begin | 22:57 | -12° |
| M55 rise | 00:17 | |
| Moon Set | 02:50 | 16° |
| Astrosession end | 04:03 | 19° |
| M55 transit | 04:15 | 19° |
| Civil sunrise | 05:31 | 17° |
| Sunrise | 06:05 | 15° |
| M55 set | 08:14 |
Track M55 Position Throughout the Night
← Thu, 5 June 2025 →
| Time | |
| Altitude | |
| Azimuth |
M55 - Globular Cluster
M55 is a globular cluster located in the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in 1752 and later cataloged by Charles Messier in 1778. The cluster contains a rich population of old stars.
M55 spans about 100 light-years across and contains around 100,000 stars. The cluster is approximately 17,600 light-years away from Earth and has an apparent magnitude of 6.3, making it visible with binoculars or a small telescope.
M55 Image Gallery
DSS Blue
DSS Red
DSS Near-Infrared
DSS Composite image
The photos are taken from the Digitized Sky Survey 2 (DSS2), which was produced at the Space Telescope Science Institute (STScI) under NASA contract, using data from the UK Science and Technology Facilities Council (STFC), the European Southern Observatory (ESO), and the National Geographic Society-Palomar Observatory Sky Survey (POSS II).
Special thanks to the National Optical Astronomy Observatory (NOAO), the Royal Observatory, Edinburgh, and the California Institute of Technology for their significant contributions.
Finder Chart for M55
| Object name | M55 |
| Field of view | |
| Limiting magnitude | |
| M55 coordinates | 19.6665, -30.96208 |
| Center coordinates | 19.6665, -30.96208 |
M55 Passage Through Night
Current position of M55
| Time | 12:57 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| M55 elevation | -49° |
| M55 Azimuth | 94° |
Annual motion of M55
| Date | Thu, 5 June 2025 |
| Twighlight start | 22:52 |
| Twighlight end | 03:58 |
| Twighlight duration | 5h 6m |
| Rise | 00:17 |
| Set | 08:14 |
| Elevation at transit | 19° |
| Transit time | 04:15 |
| Equatorial coordinates | RA: 19h 39m 59s", Dec: -30° 57' 43s |
| Magnitude | 6 |
| Constellation | Sagittarius |
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the M55 is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
Data Credits
The nebulae information on this page is sourced from the OpenNGC project, developed by Matteo Verga. OpenNGC provides detailed data on the NGC catalog, which is a valuable resource for exploring deep-sky objects such as nebulae.
For more details or to contribute to OpenNGC, visit the official GitHub repository: OpenNGC on GitHub.