Robert's Quartet

Eso_eso0535a_1024

eso_eso0535a November 4th, 2005

Credit: ESO

Robert's Quartet is a family of four very different galaxies, located at a distance of about 160 million light-years, close to the centre of the southern constellation of the Phoenix. Its members are NGC 87, NGC 88, NGC 89 and NGC 92, discovered by John Herschel in the 1830s. NGC 87 (upper right) is an irregular galaxy similar to the satellites of our Milky Way, the Magellanic Clouds. NGC 88 (centre) is a spiral galaxy with an external diffuse envelope, most probably composed of gas. NGC 89 (lower middle) is another spiral galaxy with two large spiral arms. The largest member of the system, NGC 92 (left), is a spiral Sa galaxy with an unusual appearance. One of its arms, about 100,000 light-years long, has been distorted by interactions and contains a large quantity of dust.

Provider: European Southern Observatory

Image Source: https://www.eso.org/public/images/eso0535a/

Curator: European Southern Observatory, Garching bei München, Germany

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
NGC 87 NGC 88 NGC 89 NGC 92
Subject - Local Universe
Galaxy
Eso_eso0535a_128
 

Position Details

Position (ICRS)
RA = 0h 21m 22.1s
DEC = -48° 38’ 33.8”
Orientation
North is 1.6° CW
Field of View
6.1 x 5.7 arcminutes
Constellation
Phoenix

Color Mapping

  Telescope Spectral Band Wavelength
Red VLT (FORS2) Infrared (I) 768.0 nm
Orange VLT (FORS2) Optical (R) 655.0 nm
Green VLT (FORS2) Optical (V) 557.0 nm
Blue VLT (FORS2) Optical (B) 440.0 nm
Spectrum_base
Red
Orange
Green
Blue
Eso_eso0535a_1280
×
ID
eso0535a
Subject Category
C.5  
Subject Name
NGC 87, NGC 88, NGC 89, NGC 92
Credits
ESO
Release Date
2005-11-04T00:00:00
Lightyears
Redshift
Reference Url
https://www.eso.org/public/images/eso0535a/
Type
Observation
Image Quality
Distance Notes
Facility
Very Large Telescope, Very Large Telescope, Very Large Telescope, Very Large Telescope
Instrument
FORS2, FORS2, FORS2, FORS2
Color Assignment
Red, Orange, Green, Blue
Band
Infrared, Optical, Optical, Optical
Bandpass
I, R, V, B
Central Wavelength
768, 655, 557, 440
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
5.341938, -48.642716
Reference Dimension
1825.0, 1688.0
Reference Pixel
1003.48886995, 787.109691018
Scale
-5.582397e-05, 5.582397e-05
Rotation
-1.61416963071
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
European Southern Observatory
URL
http://www.eso.org/
Name
Henri Boffin, Hans Hermann Heyer, ESO
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
European Southern Observatory
Publisher ID
eso
Resource ID
eso0535a
Metadata Date
2009-01-07T16:51:01+01:00
Metadata Version
1.1
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Detailed color mapping information coming soon...

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There is no distance meta data in this image.

 

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