| Official name | BLOCK DM-SL R/B |
| Alternative name | Blok-DM-SL (Zenit-3SL) |
| Cospar ID | 1999-056B |
| Norad ID | 25938 |
| Launch date | 1999-10-10 |
| Launch site | SEAL |
| Launch vehicle | Zenit-3SL (1) |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 678.73 |
| Inclination (deg) | 0.65 |
| Perigee (km) | 2640 |
| Apogee (km) | 35771 |
| Eccentricity | 0.862539376741038 |
| Mean motion (revs. per day) | 2.12160947652233 |
| Semi-Major axis (km) | 25583.635 |
| Raan (deg) | 24.3176 |
| Arg of perigee (deg) | 259.9678 |
| Shape | Cyl |
| Mass (kg) | 2440 |
| Diameter (m) | 3.7 |
| Height (m) | 6.3 |
| Span (m^2) | 6.3 |
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