Launch data
| Designation | 00205 / 1961 A Eta2 / 61031B |
| Launch date | 15 Nov 1961 - 22:19 UT |
| Launch site | CC, LC17B |
| Launch vehicle | Thor-DM21 Ablestar (#305 AB009?) |
| Mass at launch | 90.4 kg |
| Mission | |
| Earth orbit on Nov 21, 1961 (.5): | |
| Perigee / Apogee | 941 x 1119 km |
| Eccentricity | 0.012 |
| Inclination | 32.43 deg |
| Period | 105.64 min |
| Earth orbit on May 26, 2000 (.18): | |
| Perigee / Apogee | 952 x 1104 km |
| Eccentricity | 0.0102 |
| Inclination | 32.44° |
| Period | 105.72 min |
