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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
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Other deep sky objects in Sagittarius
All Constellations »  Sagittarius »  Deep Sky Objects » 

IC 4998 - Galaxy in Sagittarius

Altitude: -64.8°   Azimuth: 289.4°   Direction: West-North-West

IC 4998 is a Galaxy in the Sagittarius constellation. IC 4998 is situated south of the celestial equator and, as such, it is more easily visible from the southern hemisphere.

IC 4998
Galaxy
Sagittarius

IC 4998 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -64.8°
Azimuth: 289.4°
Direction: West-North-West

See also IC 4998 rise and set times.

Given its B magnitude of 14.02, IC 4998 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.

Available Resources for IC 4998 - Galaxy in Sagittarius

Photometric information of IC 4998

The following table lists the magnitude of IC 4998 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).

14.02
11.35
10.81
10.42

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 4998.

23.39 mag/arcsec2

Apparent size of IC 4998

The following table reports IC 4998 apparent angular size. The green area displayed on top of the DSS2 image of IC 4998 is a visual representation of it.
1.57 arcmin
1.08 arcmin
103°

Digitized Sky Survey image of IC 4998

The image below is a photograph of IC 4998 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 IC 4998 - Galaxy in Sagittarius star
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DSS2 image of IC 4998 in the Red band. The green region on the image is a representation of the major (1.57 arcmin) and minor (1.08 arcmin) axes of the object's apparent size.

IC 4998 - Galaxy in Sagittarius morphological classification

IC 4998 - Galaxy in Sagittarius is classified as according to the Hubble and de Vaucouleurs galaxy morphological classification. The diagram below shows a visual representation of the position of IC 4998 - Galaxy in Sagittarius in the Hubble de Vaucouleurs sequence.

IC 4998 - Galaxy in Sagittarius
Visualization of the morphological classification of IC 4998 - Galaxy in Sagittarius, .
Credits for the background image: Antonio Ciccolella / M. De Leo / CC BY

Celestial coordinates and finder chart of IC 4998

Celestial coordinates for the J2000 equinox of IC 4998 are provided in the following table:

20h 22m 10s
-38° 18’ 29”

The simplified sky charts below show the position of IC 4998 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 4998 - Galaxy in Sagittarius star
Simplified finder chart for IC 4998 - Galaxy in Sagittarius.

Finder chart IC 4998 - Galaxy in Sagittarius star
Simplified finder chart for IC 4998 - Galaxy in Sagittarius.

Rise ans set times of IC 4998 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 IC 4998 - Galaxy in Sagittarius 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: 128.3°
Max altitude: 0.2°
Azimuth: 231.7°