Globular cluster M15 (NGC 7078)

Noirlab_noao0159a_1024

noirlab_noao0159a June 30th, 2020

Credit: WIYN/NOIRLab/NSF

This is a thirty-second exposure taken on the night of September 1st 1994 (UT of observation 02/09/94:05:47) with the 1k detector on the 3.5-meter WIYN telescope. This photograph shows a region 200 arc seconds square which has been compressed in brightness (approximately a double logarithm) to show both bright and faint features. This image shows the capabilities of the WIYN telescope rather better than most observations that night, since it has a "seeing" measurement (average FWHM of several stars) of about 0.8 arc seconds. Orientation: N up, W to the left. About this object Globular clusters are tightly packed agglomerations of hundreds of thousands of stars. They have a spherical shape and are themselves distributed in a spherical halo around our Galaxy, the Milky Way. M15 (NGC 7078) is an excellent example in the constellation Pegasus. It actually covers a region more than three times the extent seen in this image. There is a significant central light excess in M15, over and above the brightness that would be expected from the normal dynamical models of globular clusters. An early suggestion that this cusp could be caused by a few thousand solar mass black hole seems less likely in the light of high resolution observations by the Hubble Space Telescope, although no final verdict is yet agreed upon by all researchers. Location: 21 30.1 +12 10 (2000.0), distance: about 34000 light-years.

Provider: NOIRLab

Image Source: https://noirlab.edu/public/images/noao0159a/

Curator: NSF's NOIRLab, Tucson, AZ, USA

Image Use Policy: Creative Commons Attribution 4.0 International License

Image Details

Image Type
Observation
Object Name
M15 NGC 7078
Noirlab_noao0159a_128
 

Position Details

Position (ICRS)
RA = 21h 30m 33.3s
DEC = 12° 9’ 3.3”
Orientation
North is 89.8° CCW
Field of View
1.7 x 1.7 arcminutes
Constellation
Pegasus

Color Mapping

  Telescope Spectral Band Wavelength
Grayscale WIYN 3.5-meter Telescope (1k detector) Optical (None) -
Noirlab_noao0159a_1280
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ID
noao0159a
Subject Category
Subject Name
M15, NGC 7078
Credits
WIYN/NOIRLab/NSF
Release Date
2020-06-30T21:34:15
Lightyears
Redshift
Reference Url
https://noirlab.edu/public/images/noao0159a/
Type
Observation
Image Quality
Distance Notes
Facility
WIYN 3.5-meter Telescope
Instrument
1k detector
Color Assignment
Grayscale
Band
Optical
Bandpass
None
Central Wavelength
Start Time
Integration Time
Dataset ID
None
Notes
Coordinate Frame
ICRS
Equinox
J2000
Reference Value
322.6388877, 12.15090534
Reference Dimension
400.0, 400.0
Reference Pixel
2248.417358, 1014.908386
Scale
-7.27e-05, 7.27e-05
Rotation
89.80817574
Coordinate System Projection:
TAN
Quality
Full
FITS Header
Notes
Creator (Curator)
NSF's NOIRLab
URL
https://noirlab.edu
Name
Email
Telephone
Address
950 North Cherry Ave.
City
Tucson
State/Province
AZ
Postal Code
85719
Country
USA
Rights
Creative Commons Attribution 4.0 International License
Publisher
NSF's NOIRLab
Publisher ID
noirlab
Resource ID
noao0159a
Metadata Date
2019-12-14T20:03:58+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.