Thank you very much for visiting Gunter's Space Page. I hope that this site is useful and informative for you.
If you appreciate the information provided on this site, please consider supporting my work by making a simple and secure donation via PayPal. Please help to run the website and keep everything free of charge. Thank you very much.
Explorer-Program
 Explorer 1 [NASA] |
IRIS (Explorer 94) [NASA] |
| Explorer | Name | Date | S | LS | Launch Vehicle | Mass (kg) | Remarks | |
|---|---|---|---|---|---|---|---|---|
 |
1 | Explorer 1 | 01.02.1958 | CC | Juno-1 | 14 | ||
|
2 | Explorer 2 | 05.03.1958 | F | CC | Juno-1 | 14 | |
|
3 | Explorer 3 | 26.03.1958 | CC | Juno-1 | 14 | ||
|
4 | Explorer 4 | 26.07.1958 | CC | Juno-1 | 17 | ||
|
5 | Explorer 5 | 24.08.1958 | F | CC | Juno-1 | 17 | |
 |
(6) | S 1 | 16.07.1959 | F | CC | Juno-2 | 41 | |
 |
6 | S 2 | 07.08.1959 | CC | Thor-DM18 Able-3 | 64 | ||
|
7 | S 1a | 13.10.1959 | CC | Juno-2 | 41 | ||
 |
(8) | S 46 | 23.03.1960 | F | CC | Juno-2 | 41 | |
 |
8 | S 30 | 03.11.1960 | CC | Juno-2 | 41 | ||
 |
(9) | S 56 | 04.12.1960 | F | WI | Scout-X1 | 36 | |
|
9 | S 56a / AD 1 | 16.02.1961 | WI | Scout-X1 | 36 | ||
 |
(10) | S 45 | 25.02.1961 | F | CC | Juno-2 | 34 | |
 |
10 | P 14 | 25.03.1961 | CC | Delta | 35 | ||
 |
11 | S 15 | 24.04.1961 | CC | Juno-2 | 43 | ||
|
(12) | S 45a | 24.05.1961 | F | CC | Juno-2 | 41 | |
 |
(12) | S 55 | 30.06.1961 | F | WI | Scout-X1 | 85 | |
 |
12 | EPE A / S 3 | 16.08.1961 | CC | Delta | 38 | ||
|
13 | S 55a | 25.08.1961 | P | WI | Scout-X1 | 85 | |
|
14 | EPE B / S 3a | 02.10.1961 | CC | Delta-A | 40 | ||
|
15 | EPE C / S 3b | 27.10.1962 | CC | Delta-A | 45 | ||
|
16 | S 55b | 16.12.1962 | WI | Scout-X3 | 101 | ||
 |
17 | AE A / S 6 | 03.04.1963 | CC | Delta-B | 184 | ||
 |
18 | IMP A / S 74 (IMP 1) | 27.11.1963 | CC | Delta-C | 62 | ||
|
19 | AD A / S 56b | 19.12.1963 | Va | Scout-X4 | 7 | ||
 |
(20) | BE A / S 66 | 19.03.1964 | F | CC | Delta-B | 120 | |
 |
20 | IE A / S 48 | 25.08.1964 | Va | Scout-X4 | 44 | ||
|
21 | IMP B (IMP 2) | 04.10.1964 | CC | Delta-C | 62 | ||
|
22 | BE B / S 66a | 10.10.1964 | Va | Scout-X4 | 53 | ||
|
23 | S 55c | 06.11.1964 | WI | Scout-X4 | 134 | ||
|
24 | AD B / S 56c | 21.11.1964 | Va | Scout-X4 | 9 | with IE B | |
 |
25 | IE B / Injun 4 | 40 | with AD B | ||||
|
26 | EPE D | 21.12.1964 | CC | Delta-C | 46 | ||
|
27 | BE C | 29.04.1965 | WI | Scout-X4 | 60 | ||
|
28 | IMP C (IMP 3) | 29.05.1965 | CC | Delta-C | 59 | ||
 |
29 | GEOS A | 06.11.1965 | CC | Delta-E | 175 | ||
 |
30 | SE A / Solrad 8 / IQSY | 19.11.1965 | WI | Scout-X4 | 57 | ||
 |
31 | DME A | 29.11.1965 | Va | Thor-DM21 Agena-B | 98 | with Alouette 2 | |
 |
32 | AE B | 25.05.1966 | CC | Delta-C1 | 225 | ||
 |
33 | IMP D (AIMP 1) | 01.07.1966 | CC | Delta-E1 | |||
 |
34 | IMP F (IMP 4) | 24.05.1967 | Va | Delta-E1 | 74 | ||
|
35 | IMP E (AIMP 2) | 19.07.1967 | CC | Delta-E1 | |||
|
36 | GEOS B | 11.01.1968 | Va | Delta-E1 | 209 | ||
 |
37 | SE B / Solrad 9 | 05.03.1968 | WI | Scout-B | 90 | ||
 |
38 | RAE A | 04.07.1968 | Va | Delta-J | 188 | ||
|
39 | AD C | 08.08.1968 | Va | Scout-X4 | 9 | with IE C | |
 |
40 | IE C / Injun 5 | 71 | with AD C | ||||
|
41 | IMP G (IMP 5) | 21.06.1969 | Va | Delta-E1 | 79 | ||
 |
42 | SAS A / Uhuru | 12.12.1970 | SM | Scout-B | 163 | ||
 |
43 | IMP I (IMP 6) | 13.03.1971 | CC | Delta-M6 | |||
 |
44 | SE C / Solrad 10 | 08.07.1971 | WI | Scout-B | 118 | ||
 |
45 | SSS A, S-Cubed A | 15.11.1971 | SM | Scout-B | 52 | ||
 |
46 | MTS A | 13.08.1972 | WI | Scout-D1 | 90 | ||
|
47 | IMP H (IMP 7) | 23.09.1972 | CC | Delta-1604 | 390 | ||
 |
48 | SAS B | 15.11.1972 | SM | Scout-D1 | 186 | ||
|
49 | RAE B | 10.06.1973 | CC | Delta-1913 | |||
|
50 | IMP J (IMP 8) | 26.10.1973 | CC | Delta-1604 | 81 | ||
 |
51 | AE C | 16.12.1973 | Va | Delta-1900 | 658 | ||
 |
52 | IE D / Injun 6 / Hawkeye | 03.06.1974 | Va | Scout-E1 | 27 | ||
 |
53 | SAS C | 04.05.1975 | SM | Scout-F1 | 195 | ||
|
54 | AE D | 06.10.1975 | Va | Delta-2910 | 676 | ||
|
55 | AE E | 20.11.1975 | CC | Delta-2910 | 721 | ||
 |
(56) | DAD A | 05.12.1975 | F | Va | Scout-F1 | 40 | with DAD B |
|
(57) | DAD B | 9 | with DAD A | ||||
 |
56 | ISEE 1 | 22.10.1977 | CC | Delta-2914 | with ISEE 2 | ||
 |
57 | IUE | 26.01.1978 | CC | Delta-2914 | 1479 / 669 | ||
 |
58 | HCMM (AEM 1) | 26.04.1978 | Va | Scout-D1 | 134 | ||
 |
59 | ISEE 3 → ICE | 12.08.1978 | CC | Delta-2914 | 469 | ||
 |
60 | SAGE (AEM 2) | 18.02.1979 | WI | Scout-D1 | 147 | ||
 |
61 | Magsat (AEM 3) | 30.10.1979 | Va | Scout-G1 | 181 | ||
 |
62 | DE 1 | 03.08.1981 | P | Va | Delta-3913 | 400 | with DE 2 |
|
63 | DE 2 | 400 | with DE 1 | ||||
 |
64 | SME | 06.10.1981 | Va | Delta-2310 | 437 | with OSCAR 9 | |
 |
65 | CCE (AMPTE 1) | 16.08.1984 | CC | Delta-3924 | 240 | with IRM, UKS | |
 |
66 | COBE | 18.11.1989 | Va | Delta-5920 | 2250 | ||
 |
67 | EUVE | 07.06.1992 | CC | Delta-6920-10 | 3256 | ||
 |
68 | SAMPEX (SMEX 1) | 03.02.1992 | Va | Scout-G1 | 158 | ||
 |
69 | XTE (RXTE) | 30.12.1995 | CC | Delta-7920-10 | 3045 | ||
 |
70 | FAST (SMEX 2) | 21.08.1996 | Va | Pegasus-XL | 180 | ||
 |
71 | ACE | 05.08.1997 | CC | Delta-7920-8 | 765 | ||
 |
72 | SNOE (STEDI 1) | 25.02.1998 | Va | Pegasus-XL | 132 | with Batsat | |
 |
73 | TRACE (SMEX 4) | 01.04.1998 | Va | Pegasus-XL | 225 | ||
 |
74 | SWAS (SMEX 3) | 05.12.1998 | WI | Pegasus-XL | 283 | ||
 |
75 | WIRE (SMEX 5) | 04.03.1999 | Va | Pegasus-XL | 275 | ||
 |
76 | TERRIERS (STEDI 2) | 18.05.1999 | Va | Pegasus-XL HAPS | 121 | with MUBLCOM | |
 |
77 | FUSE (MIDEX 0) | 24.06.1999 | CC | Delta-7320-10C | 1360 | ||
 |
78 | IMAGE (MIDEX 1) | 25.03.2000 | Va | Delta-7326 | 494 | ||
 |
79 | HETE 2 | 09.10.2000 | Kw | Pegasus-H | 124 | ||
 |
80 | MAP (WMAP, MIDEX 2) | 30.06.2001 | CC | Delta-7425-10C | 800 | ||
 |
81 | HESSI (RHESSI, SMEX 6) | 05.02.2002 | CC | Pegasus-XL | 293 | ||
 |
(Int) | INTEGRAL | 17.10.2002 | TB | Proton-K Blok-DM2 | Participation on INTEGRAL | ||
 |
82 | CHIPSat (UNEX 1) | 13.01.2003 | Va | Delta-7320-10C | 60 | with ICESAT | |
 |
83 | GALEX (SMEX 7) | 28.04.2003 | CC | Pegasus-XL | 312 | ||
 |
84 | Swift (MIDEX 3) | 20.11.2004 | CC | Delta-7320-10C | 1331 | ||
 |
(MoO) | Astro E2 | 10.07.2005 | Ka | M-5 (2) | Instrument on Astro E2 | ||
| (MoO) | TWINS A | 28.06.2006 | Va | Delta-4M+(4,2) | Payload on Trumpet F/O 1 | |||
 |
85 | THEMIS P1 (MIDEX 5A) → ARTEMIS P1 | 17.02.2007 | CC | Delta-7925-10C | 100 | with THEMIS P2, P3, P4, P5 | |
|
86 | THEMIS P2 (MIDEX 5B) → ARTEMIS P2 | 100 | with THEMIS P1, P3, P4, P5 | ||||
|
87 | THEMIS P3 (MIDEX 5C) | 100 | with THEMIS P1, P2, P4, P5 | ||||
|
88 | THEMIS P4 (MIDEX 5D) | 100 | with THEMIS P1, P2, P3, P5 | ||||
|
89 | THEMIS P5 (MIDEX 5E) | 100 | with THEMIS P1, P2, P3, P4 | ||||
 |
90 | AIM (SMEX 9) | 25.04.2007 | Va | Pegasus-XL | 200 | ||
| (MoO) | TWINS B | 13.03.2008 | Va | Atlas-5(411) | Payload on Trumpet F/O 2 | |||
 |
(MoO) | CINDI | 16.04.2008 | Kw | Pegasus-XL | Instruments on C/NOFS | ||
 |
91 | IBEX (SMEX 10) | 19.10.2008 | Kw | Pegasus-XL [Star-27] | 105 | ||
 |
92 | WISE (MIDEX 6) | 14.12.2009 | Va | Delta-7320-10C | 532 | ||
 |
93 | NuSTAR (SMEX 11) | 13.06.2012 | Kw | Pegasus-XL | 360 | ||
 |
94 | IRIS (SMEX 12) | 28.06.2013 | Va | Pegasus-XL | 236 | ||
|
||||||||
| Explorer | Name | Date | Suc | LS | Launch Vehicle | Mass (kg) | Remarks | |
 |
(MoO) | NeXT | xx.xx.2014 | H-2A | Instrument on Astro H | |||
 |
TESS (Astro-EX 1) | xx.xx.2017 | 325 | |||||
 |
(MoO) | NICER | xx.xx.2017 | Falcon-9 v1.1 or H-2B | Instrument on ISS | |||
 |
ICON (Helio-EX 1) | xx.xx.2017 | 272 | |||||
| (MoO) | GOLD | xx.xx.2017 | Instrument on GEO comsat | |||||
|
||||||||
| Explorer | Name | Date | Suc | LS | Launch Vehicle | Mass (kg) | Remarks | |
 |
Owl 1 | cancelled 1966 ? | Va | Scout-A | 70 | |||
|
Owl 2 | cancelled 1966 ? | Va | Scout-A | 70 | |||
| MSS A | cancelled 197x? | WI | Scout-B ? | 36 | ||||
 |
CATSAT (STEDI 3) | cancelled | Va | Delta-7320-10C | 109 | with ICESAT | ||
 |
IMEX (UNEX 2) | cancelled | CC | Titan-402B IUS | with DSP 22 | |||
 |
FAME (MIDEX 4) | cancelled | CC | Delta-7425-10C | ||||
 |
SPIDR (SMEX 8) | cancelled 2003 | Va | Pegasus-XL [Star-26C] | ||||
 |
GEMS (SMEX 13) | cancelled 2012 | CC | Pegasus-XL * | 267 | |||
* = Launch vehicle baselined
