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🌎 Location: Greenwich, United Kingdom [change]

Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy

Messier 100 is a Intermediate Spiral Galaxy in the Coma Berenices constellation. Messier 100 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year.

Messier 100
Galaxy
Coma Berenices
  • Messier 100 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 42° above the horizon. See also rise and set times.
  • Given its visual magnitude of 9.35, Messier 100 is visible with the help of a binocular with a 60-70mm aperture or a small telescope.
Available Resources for Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy

Photometric information of Messier 100

The following table lists the magnitude of Messier 100 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).

10.05
9.35
7.46
6.82
6.59

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

The surface brightess reported below is an indication of the brightness per unit of angular area of Messier 100.

22.61 mag/arcsec2

Apparent size of Messier 100

The following table reports Messier 100 apparent angular size. The green area displayed on top of the DSS2 image of Messier 100 is a visual representation of it.
6.1 arcmin
5.62 arcmin
108°

Digitized Sky Survey image of Messier 100

The image below is a photograph of Messier 100 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins).

Image of Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy star
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DSS2 image of Messier 100 in the Red band. The green region on the image is a representation of the major (6.1 arcmin) and minor (5.62 arcmin) axes of the object's apparent size.

Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy morphological classification

Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy is classified as Intermediate Spiral (SABb) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy in the Hubble de Vaucouleurs sequence.

Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy
Visualization of the morphological classification of Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy, Intermediate Spiral (SABb).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of Messier 100

Celestial coordinates for the J2000 equinox of Messier 100 are provided in the following table:

12h 22m 54s
+15° 49’ 18”

The simplified sky charts below show the position of Messier 100 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

Finder chart Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy star
Simplified finder chart for Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy.

Finder chart Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy star
Simplified finder chart for Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy.

Rise ans set times of Messier 100 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.2°
Max altitude: 54.3°
Azimuth: 285.8°
Messier 100 (The Mirror of M99) - Intermediate Spiral Galaxy is below the horizon from Greenwich, United Kingdom