Black Hole-Powered Spiral Galaxy NGC 7742

Stsci_1998-28a_1024

stsci_1998-28a October 21st, 1998

Credit: Hubble Heritage Team (AURA/STScI/NASA/ESA)

What may first appear as a sunny side up egg is actually NASA Hubble Space Telescope's face-on snapshot of the small spiral galaxy NGC 7742. But NGC 7742 is not a run-of-the-mill spiral galaxy. In fact, this spiral is known to be a Seyfert 2 active galaxy, a type of galaxy that is probably powered by a black hole residing in its core. The core of NGC 7742 is the large yellow "yolk" in the center of the image. The lumpy, thick ring around this core is an area of active starbirth. The ring is about 3,000 light-years from the core. Tightly wound spiral arms also are faintly visible. Surrounding the inner ring is a wispy band of material, which is probably the remains of a once very active stellar breeding ground.

Provider: Space Telescope Science Institute

Image Source: https://hubblesite.org/contents/news-releases/1998/news-1998-28

Curator: STScI, Baltimore, MD, USA

Image Use Policy: http://hubblesite.org/copyright/

Image Details Image Details

Image Type
Observation
Object Name
NGC 7742
Subject - Local Universe
Galaxy > Activity > AGN > Seyfert
Galaxy > Type > Spiral

Distance Details Distance

Universescale2
70,000,000 light years
Stsci_1998-28a_128
 

Position Details Position Details

Position (ICRS)
RA = 23h 44m 13.4s
DEC = 10° 45’ 33.4”
Orientation
North is 73.9° CCW
Field of View
1.3 x 1.3 arcminutes
Constellation
Pegasus

Color Mapping Details Color Mapping

  Telescope Spectral Band Wavelength
Blue Hubble (WFPC2) Ultraviolet (U) 336.0 nm
Green Hubble (WFPC2) Optical (V) 555.0 nm
Red Hubble (WFPC2) Optical (R) 675.0 nm
Spectrum_base
Blue
Green
Red
Stsci_1998-28a_1280
×
ID
1998-28a
Subject Category
C.5.3.2.2   C.5.1.1  
Subject Name
NGC 7742
Credits
Hubble Heritage Team (AURA/STScI/NASA/ESA)
Release Date
1998-10-21T00:00:00
Lightyears
70,000,000
Redshift
70,000,000
Reference Url
https://hubblesite.org/contents/news-releases/1998/news-1998-28
Type
Observation
Image Quality
Good
Distance Notes
Distance in lightyears
Facility
Hubble, Hubble, Hubble
Instrument
WFPC2, WFPC2, WFPC2
Color Assignment
Blue, Green, Red
Band
Ultraviolet, Optical, Optical
Bandpass
U, V, R
Central Wavelength
336, 555, 675
Start Time
Integration Time
Dataset ID
Notes
Coordinate Frame
ICRS
Equinox
2000.0
Reference Value
356.05579556417, 10.75929079222
Reference Dimension
428.00, 427.00
Reference Pixel
416.99875314504, 370.18184230090
Scale
-0.00004894893, 0.00004894893
Rotation
73.89487074664
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
World Coordinate System resolved using PinpointWCS 0.9.2 revision 218+ by the Chandra X-ray Center FITS X FITS Y EPO X EPO Y 642.95 575.91 166.61 168.21 663.18 777.40 279.02 188.29 538.26 754.23 246.90 252.92 556.86 743.92 244.22 241.17 Center Pixel Coordinates: 214.00 356.06601639059 213.50 10.76679170617
Creator (Curator)
STScI
URL
http://hubblesite.org
Name
Space Telescope Science Institute Office of Public Outreach
Email
outreach@stsci.edu
Telephone
410-338-4444
Address
3700 San Martin Drive
City
Baltimore
State/Province
MD
Postal Code
21218
Country
USA
Rights
http://hubblesite.org/copyright/
Publisher
STScI
Publisher ID
stsci
Resource ID
STSCI-H-p9828a-f-428x427.tif
Resource URL
https://mast.stsci.edu/api/latest/Download/file?uri=mast:OPO/product/STSCI-H-p9828a-f-428x427.tif
Related Resources
http://hubblesite.org/newscenter/archive/releases/1998/28
Metadata Date
2022-07-06T00:00:00
Metadata Version
1.2
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Detailed color mapping information coming soon...

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Universescalefull
70,000,000 light years

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