| Object Data |
| Description |
M4 is the closest of all the globular clusters, and
can be seen with the unaided eye from a dark-sky location. It would be the
brightest and prettiest globular in the sky if it were not obscured by
thick clouds of dark interstellar matter. |
| Constellation |
Scorpius the Scorpion |
| Right Ascension |
16h 23m 48s |
| Declination |
-26° 31' 59" |
| Magnitude |
5.6 |
| Angular size |
22.8 arcminutes |
| Distance |
2.2 kiloparsecs (7,125 light years) |
| Radial Velocity |
70.2 kilometers per second |
| Image Data |
| Photographer |
Fred Lehman |
| Main Scope |
Meade 12" LX200 @ f/5.0 (1525mm) |
| Guide Scope |
Orion 120mm refractor @ f/3.75 |
| Guide Camera |
SBIG STV |
| Imaging Camera |
Starlight Xpress MX7C |
| Resolution |
752 x 580 @ 1.2 arcseconds per pixel |
| Exposure |
Nine exposures of two minutes each. Aligned, stacked,
and processed with AstroArt. |
| Date |
June 25, 2003 |
| Location |
Area 51 in Big Cypress National Preserve in central
South Florida. |
