Technical facts about this news release:
| About the Object |
| Object Name: |
M4 (NGC 6121) |
| Object Description: |
Globular Cluster |
| Position (J2000): |
R.A. 16h 23m 35.4s
Dec. -26° 31' 31.9" |
| Constellation: |
Scorpius |
| Distance: |
M4 is roughly 5,600 light-years from the Earth. |
|
| About the 1995 HST Data |
| Instrument: |
WFPC2 |
| Exposure Date(s): |
February - March 1995 |
| Exposure Time: |
1.2 days |
| Principal Astronomers: |
H. Richer (UBC), D. Vandenberg (U.Victoria), P. Stetson (DAO), M.
Bolte (UCSC/Lick Obs.), C. Pryor (Rutgers U.), R. Mcclure (DAO), J.
Hesser (DAO), G. Fahlman (CFHT), H. Bond (STScI), R. Bell (U. Maryland) |
| Filters: |
F336W (B), F555W (V), F814W (I) |
|
| About the 2001 HST Data |
| Instrument: |
WFPC2; STIS (MULTIACCUM) |
| Exposure Date(s): |
January - April 2001 |
| Exposure Time: |
7.4 days |
| Principal Astronomers: |
H. Richer (U. British Columbia), G. Fahlman (CFHT), B. Gibson (U.
Colorado), B. Hansen (Princeton U.), R. Ibata (ESO), M. Limongi (Osservatorio
Astronomico di Roma), M. Rich (UCLA), M. Shara (AMNH), P. Stetson
(DAO) |
| Filters: |
F336W (B), F555W (V), F814W (I) |
|
| About the Image |
| Image Credit: |
NASA and H. Richer (U. British Columbia) |
| Release Date: |
April 24, 2002 |
|
