Back Titan II SLV Galician טיטן 2 23G HE Titan 23G ID タイタン23G Japanese Titan 23G Portuguese Титан-23G Russian 泰坦2號23G運載火箭 Chinese
 Titan 23G launches NOAA-15, 13 May 1998 | |
| Function | Medium-lift launch vehicle |
|---|---|
| Manufacturer | Martin Marietta / Lockheed Martin |
| Country of origin | United States |
| Size | |
| Height | 31.4 m (103 ft) |
| Diameter | 3.05 m (10.0 ft) |
| Mass | 117,020 kg (257,980 lb) |
| Stages | 2 or 3 |
| Capacity | |
| Payload to LEO | |
| Mass | 3,600 kg (7,900 lb) |
| Payload to Polar LEO | |
| Mass | 2,177 kg (4,799 lb) |
| Payload to HCO | |
| Mass | 227 kg (500 lb) |
| Associated rockets | |
| Family | Titan |
| Launch history | |
| Status | Retired |
| Launch sites | Vandenberg, SLC-4W |
| Total launches | 13 |
| Success(es) | 12 |
| Failure(s) | 1 |
| First flight | 5 September 1988 |
| Last flight | 18 October 2003 |
| Type of passengers/cargo | Clementine QuickSCAT |
| First stage | |
| Powered by | LR-87 (one engine with two combustion chambers) |
| Maximum thrust | 1,900 kN (430,000 lbf) |
| Specific impulse | 258 s (2.53 km/s) |
| Burn time | 156 seconds |
| Propellant | N2O4 / Aerozine 50 |
| Second stage | |
| Powered by | 1 LR-91 |
| Maximum thrust | 445 kN (100,000 lbf) |
| Specific impulse | 316 s (3.10 km/s) |
| Burn time | 180 seconds |
| Propellant | N2O4 / Aerozine 50 |
| Third stage (Optional) – Star-37XFP-ISS | |
| Empty mass | 71.7 kg (158 lb) |
| Gross mass | 955.3 kg (2,106 lb) |
| Propellant mass | 883.6 kg (1,948 lb) |
| Maximum thrust | 38.03 kN (8,550 lbf) |
| Specific impulse | 290 s (2.8 km/s) |
| Burn time | 67 seconds |
| Propellant | HTPB |
| Third stage (Optional) – Star-37S | |
| Empty mass | 53.4 kg (118 lb) |
| Gross mass | 711.4 kg (1,568 lb) |
| Propellant mass | 658 kg (1,451 lb) |
| Specific impulse | 287 s (2.81 km/s) |
The Titan 23G, Titan II(23)G, Titan 2(23)G or Titan II SLV was an American medium-lift launch vehicle derived from the LGM-25C Titan II intercontinental ballistic missile. Retired Titan II missiles were converted by Martin Marietta, into which the Glenn L. Martin Company, which built the original Titan II, had merged. It was used to carry payloads for the United States Air Force (USAF), NASA and National Oceanic and Atmospheric Administration (NOAA). Thirteen were launched from Space Launch Complex 4W (SLC-4W) at the Vandenberg Air Force Base between 1988 and 2003.[1]