NGC 684 - Spiral Galaxy in Triangulum
NGC 684 is a Spiral Galaxy in the Triangulum constellation. NGC 684 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
- NGC 684 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 57° above the horizon. See also rise and set times.
- Given its B magnitude of 13.2, NGC 684 is visible with the help of a telescope havng an aperture of 10 inches (250mm) or more.
Photometric information of NGC 684
The following table lists the magnitude of NGC 684 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 684.
Apparent size of NGC 684The following table reports NGC 684 apparent angular size. The green area displayed on top of the DSS2 image of NGC 684 is a visual representation of it.
Digitized Sky Survey image of NGC 684
The image below is a photograph of NGC 684 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 684 - Spiral Galaxy in Triangulum morphological classification
NGC 684 - Spiral Galaxy in Triangulum 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 NGC 684 - Spiral Galaxy in Triangulum 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 684
Celestial coordinates for the J2000 equinox of NGC 684 are provided in the following table:
The simplified sky charts below show the position of NGC 684 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 684 from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Today's NGC 684 - Spiral Galaxy in Triangulum rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):