Flight
- Date and time (UTC)
- September 24, 2017, 05:49
- Launch designation
- 2017-056
- Mission
- Adv TRUMPET 4?
- Flight name
- USA 278
- Vehicle flight ID
- AV-072
- Flight code
- NROL-42
- Year
- Launches in 2017
Orbit and payload
- Initial perigee
- 165 km
- Initial apogee
- 250 km
- Inclination
- 28.5°
- Payload mass to orbit
- 4.0 t
- Payloads
- 1
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| USA 278 | 2017-056ANORAD 42941 | National Reconnaissance Office | Signals intelligence | 4,000 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.