SpaceX CRS-4, also known as SpX-4, was a Commercial Resupply Service mission to the International Space Station, contracted to NASA, which was launched on 21 September 2014 and arrived at the space station on 23 September 2014. It was the sixth flight for SpaceX's uncrewed Dragon cargo spacecraft, and the fourth SpaceX operational mission contracted to NASA under a Commercial Resupply Services contract. The mission brought equipment and supplies to the space station, including the first 3D printer to be tested in space, a device to measure wind speed on Earth, and small satellites to be launched from the station. It also brought 20 mice for long-term research aboard the ISS.

Mission type: ISS resupply
Operator: SpaceX
COSPAR ID: 2014-056A
SATCAT no. 40210
Mission duration: Planned: 4 weeks
Final: 34 days, 13 hours, 46 minutes

Spacecraft properties
Spacecraft: Dragon C106
Spacecraft type: CRS Dragon
Manufacturer: SpaceX
Dry mass: 4,200 kg (9,300 lb)
Dimensions: Height: 6.1 m (20 ft)
Diameter: 3.7 m (12 ft)

Start of mission
Launch date:
21 September 2014, 05:52:03 UTC
Rocket: Falcon 9 v1.1
Launch site: Cape Canaveral SLC-40
Contractor: SpaceX

End of mission
Disposal
Recovered
Landing date: 25 October 2014, 19:39 UTC

Orbital parameters
Reference system: Geocentric
Regime: Low Earth
Inclination: 51.6°
Epoch: Planned

Berthing at ISS
Berthing port
Harmony nadir
RMS capture: 23 September 2014, 10:52 UTC
Berthing date: 23 September 2014, 13:21 UTC
Unberthing date: 25 October 2014, 12:02 UTC
RMS release: 25 October 2014, 13:56 UTC
Time berthed: 31 days, 22 hours, 41 minutes

Cargo
Mass: 2,216 kg (4,885 lb)
Pressurised: 1,627 kg (3,587 lb)
Unpressurised: 589 kg (1,299 lb