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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:54  
clear_day Transit: 12:49  
SunsetSet: 18:43 south
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Other deep sky objects in Triangulum
All Constellations »  Triangulum »  Deep Sky Objects » 

NGC 917 - Spiral Galaxy in Triangulum

Altitude: 29.1°   Azimuth: 285.7°   Direction: West-North-West

NGC 917 is a Spiral Galaxy in the Triangulum constellation. NGC 917 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.

NGC 917
Galaxy
Triangulum

NGC 917 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 29.1°
Azimuth: 285.7°
Direction: West-North-West

See also NGC 917 rise and set times.

Given its B magnitude of 14.5, NGC 917 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

Available Resources for NGC 917 - Spiral Galaxy in Triangulum

Photometric information of NGC 917

The following table lists the magnitude of NGC 917 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).

14.5
10.56
9.92
9.57

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 917.

23.86 mag/arcsec2

Apparent size of NGC 917

The following table reports NGC 917 apparent angular size. The green area displayed on top of the DSS2 image of NGC 917 is a visual representation of it.
1.77 arcmin
0.99 arcmin
57°

Digitized Sky Survey image of NGC 917

The image below is a photograph of NGC 917 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 917 - Spiral Galaxy in Triangulum star
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DSS2 image of NGC 917 in the Red band. The green region on the image is a representation of the major (1.77 arcmin) and minor (0.99 arcmin) axes of the object's apparent size.

NGC 917 - Spiral Galaxy in Triangulum morphological classification

NGC 917 - Spiral Galaxy in Triangulum is classified as Spiral (SAab) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 917 - Spiral Galaxy in Triangulum in the Hubble de Vaucouleurs sequence.

NGC 917 - Spiral Galaxy in Triangulum
Visualization of the morphological classification of NGC 917 - Spiral Galaxy in Triangulum, Spiral (SAab).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of NGC 917

Celestial coordinates for the J2000 equinox of NGC 917 are provided in the following table:

02h 26m 08s
+31° 54’ 44”

The simplified sky charts below show the position of NGC 917 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 917 - Spiral Galaxy in Triangulum star
Simplified finder chart for NGC 917 - Spiral Galaxy in Triangulum.

Finder chart NGC 917 - Spiral Galaxy in Triangulum star
Simplified finder chart for NGC 917 - Spiral Galaxy in Triangulum.

Rise ans set times of NGC 917 from your location

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

Today's NGC 917 - Spiral Galaxy in Triangulum rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 58.1°
Max altitude: 70.4°
Azimuth: 301.9°