Flight
- Date and time (UTC)
- December 3, 1999, 16:22
- Launch designation
- 1999-064
- Mission
- Helios 1B
- Flight name
- Helios 1B/Clementine
- Vehicle flight ID
- V124 L492
- Year
- Launches in 1999
Orbit and payload
- Initial apogee
- 687 km
- Payload mass to orbit
- 2.6 t
- Payloads
- 2
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Helios 1B | 1999-064ANORAD 25977 | National Space Research Center | Optical imaging | 2,544 kg | In orbit |
| Clementine | 1999-064BNORAD 25978 | National Space Research Center | Signals intelligence | 50 kg | In orbit |
Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.