Catalogue · 214 objects
Orbit class, mission and constellation are derived · methodology
Catalogue rows come from CelesTrak SATCAT; perigee, apogee and inclination shown here are catalogue values (the detail page shows the latest element set). Facet counts are computed live over the filtered set.
| HEO |
| 345 / 141,789 km |
| 54.97° |
| 05 Sept 1964↓ 29 Aug 2020 |
| United States |
| United States |
| ERS 13 | 838 | 1964-040C | Payload | Decayed | HEO | 319 / 103,994 km | 38.30° | 17 Jul 1964↓ 01 Jan 1966 | United States | United States |
| OPS 3674 (VELA 4) | 837 | 1964-040B | Payload | Unknown | HEO | 32,089 / 173,878 km | 48.46° | 17 Jul 1964 | United States | United States |
| OPS 3662 (VELA 3) | 836 | 1964-040A | Payload | Unknown | HEO | 45,227 / 161,257 km | 53.10° | 17 Jul 1964 | United States | United States |
| ELEKTRON 4 | 830 | 1964-038B | Payload | Decayed | HEO | 64 / 64,925 km | 65.85° | 10 Jul 1964↓ 12 Oct 1983 | Commonwealth of Independent States (former USSR) | Russia |
| EXPLORER 18 (IMP-1) | 693 | 1963-046A | Payload | Decayed | HEO | 4,386 / 192,044 km | 35.19° | 27 Nov 1963↓ 30 Dec 1965 | United States | United States |
| VELA 1 | 692 | 1963-039C | Payload | Unknown | HEO | 48,413 / 170,386 km | 33.65° | 17 Oct 1963 | United States | United States |
| ERS 12 | 675 | 1963-039B | Payload | Decayed | HEO | 953 / 102,374 km | 35.90° | 17 Oct 1963↓ 05 Feb 1966 | United States | United States |
| VELA 2 | 674 | 1963-039A | Payload | Unknown | HEO | 33,707 / 184,057 km | 47.86° | 17 Oct 1963 | United States | United States |
| EXPLORER 14 (SERB 53A) | 432 | 1962-051A | Payload | Decayed | HEO | 23 / 98,756 km | 24.10° | 02 Oct 1962↓ 28 May 1988 | United States | United States |
| EXPLORER 12 | 170 | 1961-020A | Payload | Decayed | HEO | 693 / 76,977 km | 33.83° | 15 Aug 1961↓ 30 Sept 1963 | United States | United States |
| LUNA 3 | 21 | 1959-008A | Payload | Decayed | HEO | 500 / 499,998 km | 55.00° | 04 Oct 1959↓ 20 Apr 1960 | Commonwealth of Independent States (former USSR) | Russia |
| EXPLORER 6 | 15 | 1959-004A | Payload | Decayed | HEO | 251 / 42,276 km | 46.95° | 07 Aug 1959↓ 30 Jun 1961 | United States | United States |