We use cookies to deliver essential features and to measure their performance. Learn more.
menu
A Complete Guide to the Solar System and the Night Sky
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
Timezone: Europe/London
Sunrise: 7:17 
Transit: 12:46 
Sunset: 18:15
sunny   (Daytime)  
What's Visible Now • Tonight Timeline
Search  close

Other deep sky objects in Coma Berenices
All Constellations »  Coma Berenices »  Deep Sky Objects » 

Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices

Above the horizon.  Rise: 5:05 | Tran: 12:18 | Set: 19:31
Alt: 39.93°   Az: 237.84°   Direction: West-South-West

Messier 91 is a Spiral Galaxy in the Coma Berenices constellation. Messier 91 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. Given its visual magnitude of 13.57, Messier 91 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.

The image below is a photograph of Messier 91 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 0.5000x0.5000 degrees (30.00x30.00 arcmins).

Image of Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices star
/>
DSS2 image of Messier 91 in the Red band. The green region on the image is a representation of the major (5.55 arcmin) and minor (4.52 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

12h 36m 40s
+14° 21’ 36”
02h 48m 16s
15h 24m 57s

J2000

12h 35m 26s
+14° 29’ 46”

Finder Chart

The simplified sky charts below show the position of Messier 91 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 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices star
Simplified finder chart for Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices.

Finder chart Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices star
Simplified finder chart for Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices.

Photometric Information

The following table lists the magnitude of Messier 91 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).

14.63
13.57
8.01
7.37
7.12

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 91.

23.24 mag/arcsec2

Apparent Size

The following table reports Messier 91 apparent angular size. The green area displayed on top of the DSS2 image of Messier 91 is a visual representation of it.
5.55 arcmin
4.52 arcmin
150°

Morphological Classification

Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices is classified as Spiral (SAb) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices in the Hubble de Vaucouleurs sequence.

Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices
Visualization of the morphological classification of Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices, Spiral (SAb).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Rise and Set Times

Location: Greenwich, UK
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Messier 91 (Missing Messier Object) - Spiral Galaxy in Coma Berenices rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 75.6°
Max altitude: 52.9°
Azimuth: 284.4°