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🌎  Greenwich, United Kingdom [change]

NGC 6640 - Spiral Galaxy in Lyra

NGC 6640 is a Spiral Galaxy in the Lyra constellation. NGC 6640 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.

NGC 6640
Galaxy
Lyra
  • NGC 6640 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 56° above the horizon. See also rise and set times.
  • Given its B magnitude of 14.2, NGC 6640 is visible with the help of a telescope havng an aperture of 14 inches (350mm) or more.
Available Resources for NGC 6640 - Spiral Galaxy in Lyra

Photometric information of NGC 6640

The following table lists the magnitude of NGC 6640 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).

14.2
11.31
10.59
10.33

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 6640.

21.63 mag/arcsec2

Apparent size of NGC 6640

The following table reports NGC 6640 apparent angular size. The green area displayed on top of the DSS2 image of NGC 6640 is a visual representation of it.
0.83 arcmin
0.18 arcmin
146°

Digitized Sky Survey image of NGC 6640

The image below is a photograph of NGC 6640 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 6640 - Spiral Galaxy in Lyra star
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DSS2 image of NGC 6640 in the Red band. The green region on the image is a representation of the major (0.83 arcmin) and minor (0.18 arcmin) axes of the object's apparent size.

NGC 6640 - Spiral Galaxy in Lyra morphological classification

NGC 6640 - Spiral Galaxy in Lyra is classified as Spiral (SAc) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 6640 - Spiral Galaxy in Lyra in the Hubble de Vaucouleurs sequence.

NGC 6640 - Spiral Galaxy in Lyra
Visualization of the morphological classification of NGC 6640 - Spiral Galaxy in Lyra, Spiral (SAc).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of NGC 6640

Celestial coordinates for the J2000 equinox of NGC 6640 are provided in the following table:

18h 28m 08s
+34° 18’ 09”

The simplified sky charts below show the position of NGC 6640 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 6640 - Spiral Galaxy in Lyra star
Simplified finder chart for NGC 6640 - Spiral Galaxy in Lyra.

Finder chart NGC 6640 - Spiral Galaxy in Lyra star
Simplified finder chart for NGC 6640 - Spiral Galaxy in Lyra.

Rise ans set times of NGC 6640 from your location

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

Today's NGC 6640 - Spiral Galaxy in Lyra rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 55.7°
Max altitude: 72.8°
Azimuth: 304.3°
NGC 6640 - Spiral Galaxy in Lyra is below the horizon from Greenwich, United Kingdom