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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:55 
Transit: 11:43 
Sunset: 16:31
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All Constellations »  Pisces »  Deep Sky Objects » 

IC 1691 - Lenticular Galaxy in Pisces

Above the horizon.  Rise: 12:56 | Tran: 22:39 | Set: 8:25
Alt: 68.78°   Az: 218.33°   Direction: South-West

IC 1691 is a Lenticular Galaxy in the Pisces constellation. IC 1691 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its B magnitude of 16.26, IC 1691 is visible only through long exposure photography.

The image below is a photograph of IC 1691 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 0.5000x0.5000 degrees (30.00x30.00 arcmins).

Image of IC 1691 - Lenticular Galaxy in Pisces star
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DSS2 image of IC 1691 in the Red band. The green region on the image is a representation of the major (0.46 arcmin) and minor (0.39 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

01h 25m 50s
+33° 32’ 08”
01h 02m 29s
02h 28m 20s

J2000

01h 24m 25s
+33° 24’ 24”

Finder Chart

The simplified sky charts below show the position of IC 1691 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 IC 1691 - Lenticular Galaxy in Pisces star
Simplified finder chart for IC 1691 - Lenticular Galaxy in Pisces.

Finder chart IC 1691 - Lenticular Galaxy in Pisces star
Simplified finder chart for IC 1691 - Lenticular Galaxy in Pisces.

Photometric Information

The following table lists the magnitude of IC 1691 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).

16.26
13.01
12.33
12.39

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 IC 1691.

23.25 mag/arcsec2

Apparent Size

The following table reports IC 1691 apparent angular size. The green area displayed on top of the DSS2 image of IC 1691 is a visual representation of it.
0.46 arcmin
0.39 arcmin
122°

Morphological Classification

IC 1691 - Lenticular Galaxy in Pisces is classified as Lenticular (S0-Aa) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 1691 - Lenticular Galaxy in Pisces in the Hubble de Vaucouleurs sequence.

IC 1691 - Lenticular Galaxy in Pisces
Visualization of the morphological classification of IC 1691 - Lenticular Galaxy in Pisces, Lenticular (S0-Aa).
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Rise and Set Times

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

Today's IC 1691 - Lenticular Galaxy in Pisces rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.5°
Max altitude: 72.1°
Azimuth: 303.5°