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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:52 
Transit: 11:51 
Sunset: 15:50
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All Constellations »  Canes Venatici »  Deep Sky Objects » 

NGC 4938 - Barred Spiral Galaxy in Canes Venatici

Above the horizon.  Circumpolar today
Alt: 13.99°   Az: 12.46°   Direction: North-North-East

NGC 4938 is a Barred Spiral Galaxy in the Canes Venatici constellation. NGC 4938 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Given its B magnitude of 15.3, NGC 4938 is visible with the help of a telescope having an aperture of 20 inches (500mm) or more.

The image below is a photograph of NGC 4938 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 NGC 4938 - Barred Spiral Galaxy in Canes Venatici star
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DSS2 image of NGC 4938 in the Red band. The green region on the image is a representation of the major (0.87 arcmin) and minor (0.78 arcmin) axes of the object's apparent size.

Celestial Coordinates

Apparent

13h 04m 03s
+51° 11’ 06”
13h 18m 03s
02h 22m 07s

J2000

13h 02m 57s
+51° 19’ 06”

Finder Chart

The simplified sky charts below show the position of NGC 4938 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

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Finder chart for NGC 4938 - Barred Spiral Galaxy in Canes Venatici.

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Finder chart for NGC 4938 - Barred Spiral Galaxy in Canes Venatici.

Photometric Information

The following table lists the magnitude of NGC 4938 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).

15.3

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 4938.

23.41 mag/arcsec2

Apparent Size

The following table reports NGC 4938 apparent angular size. The green area displayed on top of the DSS2 image of NGC 4938 is a visual representation of it.
0.87 arcmin
0.78 arcmin
44°

Morphological Classification

NGC 4938 - Barred Spiral Galaxy in Canes Venatici is classified as Barred Spiral (Bb) according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of NGC 4938 - Barred Spiral Galaxy in Canes Venatici in the Hubble de Vaucouleurs sequence.

NGC 4938 - Barred Spiral Galaxy in Canes Venatici
Visualization of the morphological classification of NGC 4938 - Barred Spiral Galaxy in Canes Venatici, Barred Spiral (Bb).
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

NGC 4938 - Barred Spiral Galaxy in Canes Venatici is circumpolar and transits at 07:57 UTC (altitude: 89.7°)