Launch data:
| Designation | 00202 / 1961 A Eta1 / 61031A |
| Launch date | 15 Nov 1961 - 22:19 UT |
| Launch site | CC, LC17B |
| Launch vehicle | Thor-DM21 Ablestar (#305 AB009?) |
| Mission | Navigation |
| Earth orbit on Nov 16, 1961 (.6): | |
| Perigee / Apogee | 956 x 1104 km |
| Eccentricity | 0.010 |
| Inclination | 32.43 deg |
| Period | 105.63 min |
| Earth orbit on May 23, 2000 (.35): | |
| Perigee / Apogee | 949 x 1100 km |
| Eccentricity | 0.010 |
| Inclination | 32,44° |
| Period | 105,65 min |
