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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?
All Constellations »  Coma Berenices »  Deep Sky Objects » 

NGC 4821 - Elliptical Galaxy in Coma Berenices

Below the horizon.  Rise: 11:02 | Tran: 19:38 | Set: 4:18
Altitude: -6.9°   Azimuth: 27.7°   Direction: North-North-East

NGC 4821 is a Elliptical Galaxy in the Coma Berenices constellation. NGC 4821 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.

The image below is a photograph of NGC 4821 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 NGC 4821 - Elliptical Galaxy in Coma Berenices star
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DSS2 image of NGC 4821 in the Red band. The green region on the image is a representation of the major (0.59 arcmin) and minor (0.34 arcmin) axes of the object's apparent size.

Key facts about NGC 4821

NGC 4821
Galaxy
Coma Berenices

NGC 4821 is below the horizon from Greenwich, UK.

Altitude: -6.9°
Azimuth: 27.7°
Direction: North-North-East

See also NGC 4821 rise and set times.

Given its B magnitude of 15, NGC 4821 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

Available Resources for NGC 4821 - Elliptical Galaxy in Coma Berenices

Photometric information of NGC 4821

The following table lists the magnitude of NGC 4821 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).

15
12.06
11.33
11.1

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 NGC 4821.

22.7 mag/arcsec2

Apparent size of NGC 4821

The following table reports NGC 4821 apparent angular size. The green area displayed on top of the DSS2 image of NGC 4821 is a visual representation of it.
0.59 arcmin
0.34 arcmin

NGC 4821 - Elliptical Galaxy in Coma Berenices morphological classification

NGC 4821 - Elliptical Galaxy in Coma Berenices is classified as Elliptical (E) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 4821 - Elliptical Galaxy in Coma Berenices in the Hubble de Vaucouleurs sequence.

NGC 4821 - Elliptical Galaxy in Coma Berenices
Visualization of the morphological classification of NGC 4821 - Elliptical Galaxy in Coma Berenices, Elliptical (E).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of NGC 4821

Celestial coordinates for the J2000 equinox of NGC 4821 are provided in the following table:

12h 56m 29s
+26° 57’ 25”

The simplified sky charts below show the position of NGC 4821 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 NGC 4821 - Elliptical Galaxy in Coma Berenices star
Simplified finder chart for NGC 4821 - Elliptical Galaxy in Coma Berenices.

Finder chart NGC 4821 - Elliptical Galaxy in Coma Berenices star
Simplified finder chart for NGC 4821 - Elliptical Galaxy in Coma Berenices.

Rise and set times of NGC 4821 from your location

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

Today's NGC 4821 - Elliptical 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: 63.0°
Max altitude: 65.5°
Azimuth: 297.0°