NGC 7817 - Spiral Galaxy in Pegasus
NGC 7817 is a Spiral Galaxy in the Pegasus constellation. NGC 7817 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 7817 is above the horizon from Greenwich, United Kingdom . Its current altitude is 30° above the horizon. See also rise and set times.
- Given its visual magnitude of 11.94, NGC 7817 is visible with the help of a telescope having an aperture of 8 inches (200mm) or more.
Photometric information of NGC 7817
The following table lists the magnitude of NGC 7817 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 7817.
Apparent size of NGC 7817The following table reports NGC 7817 apparent angular size. The green area displayed on top of the DSS2 image of NGC 7817 is a visual representation of it.
Digitized Sky Survey image of NGC 7817
The image below is a photograph of NGC 7817 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).
NGC 7817 - Spiral Galaxy in Pegasus morphological classification
NGC 7817 - Spiral Galaxy in Pegasus is classified as Spiral (SAbc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 7817 - Spiral Galaxy in Pegasus in the Hubble de Vaucouleurs sequence.
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY
Celestial coordinates and finder chart of NGC 7817
Celestial coordinates for the J2000 equinox of NGC 7817 are provided in the following table:
The simplified sky charts below show the position of NGC 7817 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.
Rise ans set times of NGC 7817 from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Today's NGC 7817 - Spiral Galaxy in Pegasus rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):