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Sky-Tonight.com / Nebulae and Deep-Sky Objects / M100

M100 Position and Visibility Tonight

Where is M100 right now?

M100 is located in the constellation Coma Berenices. Although M100 is currently 64° above the horizon, it is not visible because it is daytime.
Twilight begins at 18:26 local time. At that moment, M100 will be 9° above the horizon toward the north-west.

Open the interactive guide to M100’s position and path tonight

M100 visibility on 2026-09-07

M100 Visible from sunset until early morning

M100 rise and set timetable

	Time	Elevation
M100 transit	12:26	68°
Moonset	14:56	51°
Sunset	17:27	21°
Civil sunset	17:55	15°
Twilight start	18:26	9°
Astronomical observing session begins	18:58	3°
M100 set	19:15
Moonrise, 21% illuminated	23:21	-35°
Astronomical observing session ends	03:13	-24°
M100 rise	05:34

Track M100 Position Throughout the Night

← 7 September 2026 →

Time
Altitude
Azimuth

Shift the map to change the time and observe M100 changing position in the night sky.

M100 - Spiral Galaxy

M100 is a spiral galaxy located in the constellation Coma Berenices. It was discovered by Pierre Méchain in 1781 and later cataloged by Charles Messier. M100 is part of the Virgo Cluster of galaxies and is known for its well-defined spiral arms and bright core.

M100 spans about 107,000 light-years across and contains a massive population of stars, gas, and dust. The galaxy is approximately 55 million light-years away from Earth and has an apparent magnitude of 9.3, making it visible with a small telescope.

M100 — Image Gallery

DSS Blue

Blue images highlight younger, hotter stars that emit strongly at blue wavelengths.

DSS Red

Red images reveal older, cooler stars and emission nebulae glowing strongly in hydrogen-alpha light.

DSS Near-Infrared

Near-infrared images penetrate dust that obscures visible light and reveal hidden structures.

DSS Composite Image

DSS color images combine blue, red and often near-infrared exposures into a composite view.

The images come from the Digitized Sky Survey 2 (DSS2), produced at the Space Telescope Science Institute (STScI) under contract with NASA, using data from UK Science and Technology Facilities Council (STFC), European Southern Observatory (ESO), National Geographic Society-Palomar Observatory Sky Survey (POSS II).

Special thanks to National Optical Astronomy Observatory (NOAO), Royal Observatory, Edinburgh, California Institute of Technology for their significant contributions.

Finder Chart for M100

Double-click to unlock the map.

Object name	M100
Field of view
Limiting magnitude
M100 coordinates	12.3819, 15.82181
Center coordinates	12.3819, 15.82181

M100 Passage Through Night

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Current position of M100

Time	13:29
Latitude	37.3541
Longitude	-121.955
Elevation	64°
Azimuth	217°

Here you can see the current position of M100 on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.

When Is M100 Visible Throughout the Year?

M100 will become visible again around October 31 after moving far enough from the Sun.

Date	Mon, 7 September 2026
Twilight start	18:54
Twilight end	03:07
Twilight duration	8h 13m
Rise	05:34
Set	19:11
Elevation at transit	68°
Transit time	12:22
Equatorial coordinates	RA: 12h 22m 54s", Dec: 15° 49' 18s
Magnitude	9
Constellation	Coma Berenices

The graph illustrates the annual visibility pattern of M100, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also see when M100 is visible throughout the year in a table with exact rise, transit, and set times for each date.

Astrometric and Physical Parameters of M100

Coordinates and Visibility

Right Ascension	12h 22m 55s
Declination	15° 49′ 19″
Magnitude	9.47
Constellation	Coma Berenices
Elevation	64.4°
Azimuth	216.8°

Data Credits

The deep-sky information on this page comes from the OpenNGC project developed by Matteo Verga. OpenNGC provides detailed catalog data for nebulae, galaxies, clusters and other deep-sky objects.

For details or contributions, visit the official repository: OpenNGC GitHub.

Observation Settings