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🌎 Location: Greenwich, United Kingdom [change]

NGC 7840 - Galaxy

NGC 7840 is a Galaxy in the Pisces constellation. NGC 7840 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.

NGC 7840
  • NGC 7840 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 47° above the horizon. See also rise and set times.
  • Given its B magnitude of 16.47, NGC 7840 is visible only through long exposure photography.
Available Resources for NGC 7840 - Galaxy

Photometric information of NGC 7840

The following table lists the magnitude of NGC 7840 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).


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 7840.

24.36 mag/arcsec2

Apparent size of NGC 7840

The following table reports NGC 7840 apparent angular size. The green area displayed on top of the DSS2 image of NGC 7840 is a visual representation of it.
0.68 arcmin
0.46 arcmin

Digitized Sky Survey image of NGC 7840

The image below is a photograph of NGC 7840 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 7840 - Galaxy star
DSS2 image of NGC 7840 in the Red band. The green region on the image is a representation of the major (0.68 arcmin) and minor (0.46 arcmin) axes of the object's apparent size.

Celestial coordinates and finder chart of NGC 7840

Celestial coordinates for the J2000 equinox of NGC 7840 are provided in the following table:

00h 07m 09s
+08° 23’ 00”

The simplified sky charts below show the position of NGC 7840 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 7840 - Galaxy star
Simplified finder chart for NGC 7840 - Galaxy.

Finder chart NGC 7840 - Galaxy star
Simplified finder chart for NGC 7840 - Galaxy.

Rise ans set times of NGC 7840 from your location

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

Today's NGC 7840 - Galaxy rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.6°
Max altitude: 46.9°
Azimuth: 278.4°
NGC 7840 - Galaxy is below the horizon from Greenwich, United Kingdom