Dim and diffuse

Esahubble_potw1729a_500

esahubble_potw1729a July 17th, 2017

Credit: ESA/Hubble & NASA

Tucked away in the small northern constellation of Canes Venatici (The Hunting Dogs) is the galaxy NGC 4242, shown here as seen by the NASA/ESA Hubble Space Telescope. The galaxy lies some 30 million light-years from us. At this distance from Earth, actually not all that far on a cosmic scale, NGC 4242 is visible to anyone armed with even a basic telescope (as British astronomer William Herschel found when he discovered the galaxy in 1788). This image shows the galaxys bright centre and the surrounding dimmer and more diffuse fuzz. Despite appearing to be relatively bright in this image, studies have found that NGC 4242 is actually relatively dim (it has a moderate-to-low surface brightness and low luminosity) and also supports a low rate of star formation. The galaxy also seems to have a weak bar of stars cutting through its asymmetric centre, and a very faint and poorly-defined spiral structure throughout its disc. But if NGC 4242 is not all that remarkable, as with much of the Universe, it is still a beautiful and ethereal sight.

Image Source: https://www.spacetelescope.org/images/potw1729a/

Curator: ESA/Hubble, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 4242
Subject - Local Universe
Galaxy » Type » Spiral
Esahubble_potw1729a_128
 

Position Details

Position (ICRS)
RA = 12h 17m 30.9s
DEC = 45° 37’ 16.4”
Orientation
North is 97.7° CW
Field of View
2.7 x 2.4 arcminutes
Constellation
Canes Venatici

Color Mapping

  Telescope Spectral Band Wavelength
Arrow_left_red Hubble Space Telescope (WFC3) Infrared (I) 814.0 nm
Arrow_left_red Hubble Space Telescope (WFC3) Optical (H-alpha) 657.0 nm
Arrow_left_green Hubble Space Telescope (WFC3) Optical (V) 555.0 nm
Arrow_left_blue Hubble Space Telescope (WFC3) Optical (B) 438.0 nm
Arrow_left_cyan Hubble Space Telescope (WFC3) Ultraviolet (UV) 336.0 nm
Arrow_left_magenta Hubble Space Telescope (WFC3) Ultraviolet (UV) 275.0 nm
Spectrum_base
Arrow_top_red
Arrow_top_red
Arrow_top_green
Arrow_top_blue
Arrow_top_cyan
Arrow_top_magenta
Esahubble_potw1729a_1280
×
ID
potw1729a
Subject Category
C.5.1.1  
Subject Name
NGC 4242
Credits
ESA/Hubble & NASA
Lightyears
Redshift
Reference Url
https://www.spacetelescope.org/images/potw1729a/
Type
Observation
Image Quality
Distance Notes
Facility
Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope, Hubble Space Telescope
Instrument
WFC3, WFC3, WFC3, WFC3, WFC3, WFC3
Color Assignment
Red, Red, Green, Blue, Cyan, Magenta
Band
Infrared, Optical, Optical, Optical, Ultraviolet, Ultraviolet
Bandpass
I, H-alpha, V, B, UV, UV
Central Wavelength
814, 657, 555, 438, 336, 275
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
184.37860389, 45.6212242443
Reference Dimension
4048.0, 3579.0
Reference Pixel
2024.0, 1789.5
Scale
-1.10048075688e-05, 1.10048075688e-05
Rotation
-97.65999999999994
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
ESA/Hubble
URL
http://www.spacetelescope.org
Name
Email
Telephone
Address
Karl-Schwarzschild-Strasse 2
City
Garching bei München
State/Province
Postal Code
D-85748
Country
Germany
Rights
Creative Commons Attribution 4.0 International License
Publisher
ESA/Hubble
Publisher ID
esahubble
Resource ID
potw1729a
Metadata Date
2017-01-24T16:19:04+01:00
Metadata Version
1.1
×

Detailed color mapping information coming soon...

 

×

There is no distance meta data in this image.