Globular Cluster M15

 Globular Cluster M15

Credits

NASA and The Hubble Heritage Team (STScI/AURA)

About The Object
Object Name M15, NGC 7078
Object Description Globular Cluster in the Milky Way Galaxy
R.A. Position 21h 29m 58s
Dec. Position +12° 10' 00"
Constellation Pegasus
Distance M15's distance to Earth is about 32,600 light-years (10 kiloparsecs). Its distance to the galactic center of the Milky Way is about 34,000 light-years (10.4 kiloparsecs).
Dimensions The image is about 59 arcseconds (2.8 parsecs or 9.2 light-years) in the horizontal dimension. Mass of the black hole: 4,000 times the mass of the Sun. Mass of the globular cluster: 600,000 times the mass of the Sun
About The Data
Data Description WFPC2 Data Principal Astronomers: H. E. Bond (STScI), D. R. Alves (Columbia Astrophysics Lab.), M. Livio, L. K. Fullton and K. G. Schaefer (STScI) STIS Data Principal Astronomers: R. Van Der Marel and J. Gerssen (STScI), K. Gebhardt (U. Texas at Austin), P. Guhathakurta and R. Peterson (UCO/Lick Observatory) and C. Pryor (Rutgers U.)
Instrument HST>WFPC2 and HST>STIS
Exposure Dates December 1998, Exposure Time: 3.7 hours (WFPC2), and October 1999, May-October 2001, Exposure Time: 16 hours (STIS)
Filters WFPC2: F439W (B), F547M (Strömgren y), F502N ([O III]), F656N (H alpha), F814W (I) STIS: G430M
About The Image
Compass Image Globular Cluster M15
About The Object
Object Name A name or catalog number that astronomers use to identify an astronomical object.
Object Description The type of astronomical object.
R.A. Position Right ascension – analogous to longitude – is one component of an object's position.
Dec. Position Declination – analogous to latitude – is one component of an object's position.
Constellation One of 88 recognized regions of the celestial sphere in which the object appears.
Distance The physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
Dimensions The physical size of the object or the apparent angle it subtends on the sky.
About The Data
Data Description
  • Proposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
  • Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
Instrument The science instrument used to produce the data.
Exposure Dates The date(s) that the telescope made its observations and the total exposure time.
Filters The camera filters that were used in the science observations.
About The Image
Image Credit The primary individuals and institutions responsible for the content.
Publication Date The date and time the release content became public.
Color Info A brief description of the methods used to convert telescope data into the color image being presented.
Orientation The rotation of the image on the sky with respect to the north pole of the celestial sphere.