M91 Observation Details
M91 Daily Motion
M91 will be visible until July, 27, 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.
M91 Visibility Timetable on June 03
M91 Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 45.6% illuminated | 12:49 | -17° |
| M91 rise | 14:31 | |
| Sunset | 20:54 | 64° |
| M91 transit | 21:20 | 65° |
| Civil sunset | 21:27 | 64° |
| Astrosession begin | 22:55 | 57° |
| Moon Set | 02:10 | 22° |
| Astrosession end | 04:04 | 1° |
| M91 set | 04:09 |
Track M91 Position Throughout the Night
← Tue, 3 June 2025 →
| Time | |
| Altitude | |
| Azimuth |
M91 - Barred Spiral Galaxy
M91 is a barred spiral galaxy located in the constellation Coma Berenices. It was discovered by Charles Messier in 1781. M91 is part of the Virgo Cluster of galaxies and is known for its well-defined spiral arms and bright central bar.
M91 spans about 100,000 light-years across and contains a massive population of stars, gas, and dust. The galaxy is approximately 63 million light-years away from Earth and has an apparent magnitude of 10.2, making it visible with a small telescope.
M91 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 M91
| Object name | M91 |
| Field of view | |
| Limiting magnitude | |
| M91 coordinates | 12.59068, 14.49633 |
| Center coordinates | 12.59068, 14.49633 |
M91 Passage Through Night
Current position of M91
| Time | 10:08 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| M91 elevation | -34° |
| M91 Azimuth | -14° |
Annual motion of M91
| Date | Tue, 3 June 2025 |
| Twighlight start | 22:50 |
| Twighlight end | 03:59 |
| Twighlight duration | 5h 9m |
| Rise | 14:27 |
| Set | 04:05 |
| Elevation at transit | 65° |
| Transit time | 21:16 |
| Equatorial coordinates | RA: 12h 35m 26s", Dec: 14° 29' 46s |
| Magnitude | 11 |
| Constellation | Coma Berenices |
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 M91 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.