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United Launch AllianceAtlas V 401Space Launch Complex 41, Cape Canaveral SFS, FL, USA

Cygnus CRS Orb-4 (S.S. Deke Slayton II)

Launched

December 6, 2015

Launch Successful
Cygnus CRS Orb-4 (S.S. Deke Slayton II) Patch

Summary

Cygnus CRS Orb-4 (S.S. Deke Slayton II) launched on an United Launch Alliance Atlas V 401 from Space Launch Complex 41, Cape Canaveral SFS, FL, USA on December 6, 2015. It was United Launch Alliance's 104th launch, 12th this year and humanity's 5,518th orbital launch attempt. It was the 30th Atlas V 401 flight and the 4th this year. The payload was bound for low Earth orbit (LEO). SS Deke Slayton II, one of 21 catalogued objects, reached a 241 × 245 km orbit inclined 51.7°. The spacecraft was Cygnus CRS OA-4. 21 objects from this launch are catalogued, all of them payloads.

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Vehicle
Atlas V 401 · United Launch AllianceCommercial Resupply Services, International Space Station
Booster
No booster details on record.
Mission
Resupply · Low Earth Orbit (LEO)
Milestone
30th Atlas V 401 flight · 4th this yearUnited Launch Alliance's 104th launch12th this yearhumanity's 5,518th orbital launch attempt76th orbital launch attempt this year

Spacecraft

Cygnus CRS OA-4

Cygnus CRS OA-4, also known as Orbital ATK CRS-4 and CRS Orb-4, was the fourth successful flight of the Orbital ATK uncrewed resupply spacecraft Cygnus and its third flight to the International Space Station under the Commercial Resupply Services contract with NASA. With the Antares rocket undergoing a redesign following its failure during the Orb-3 launch, OA-4 was launched by an Atlas V rocket. Following three launch delays due to inclement weather beginning on 3 December 2015, OA-4 was launched at 21:44 UTC on 6 December 2015. With a liftoff weight of 7,492 kilograms, OA-4 became the heaviest payload ever launched on an Atlas V. The spacecraft rendezvoused with and was berthed to the ISS on 9 December 2015. It was released on 19 February 2016 after 72 days at the station. Deorbit occurred on 20 February at approximately 16:00 UTC.

  • Destination: International Space Station
  • Mission length: 75 days
  • Docked December 9, 2015 at Unity nadir

The Cygnus spacecraft burned up as planned upon entering Earth's atmosphere.

Flight preview

Orbit: as tracked

51.7°Inclination
241 × 245 kmPerigee × apogeefrom mean elements
89.2 minPeriodfrom mean elements
301.8°Ascending node
3966 d agoElement epoch2015-12-06 23:13 UTC · stale

SS Deke Slayton II · NORAD 41101 · 2015-072 · Space-Track · tracking 1 of 21 objects

Show the numbers for orbit elements
Object
TBA - TO BE ASSIGNED
Object ID
2015-072A
Epoch
2015-12-06 23:13:08 UTC
Mean motion
16.14036553 rev/day
Eccentricity
0.0002504
Inclination
51.6505°
Ascending node
301.834°
Arg. of perigee
262.9127°
Mean anomaly
96.9928°
Element set
999
Rev at epoch
1
B*
0

Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.

Catalogued objects

21 catalogued: 21 payloads

  • SS Deke Slayton II · NORAD 41101
  • AggieSat-4 · NORAD 41313
  • Bevo-2 · NORAD 41314 · re-entered June 13, 2017
  • MinXSS · NORAD 41474 · re-entered May 6, 2017
  • CADRE · NORAD 41475 · re-entered January 3, 2017
  • STMSat 1 · NORAD 41476 · re-entered April 21, 2017
  • Nodes 1 · NORAD 41477 · re-entered September 19, 2017
  • Nodes 2 · NORAD 41478 · re-entered September 23, 2017
  • Flock 2e-1 · NORAD 41483 · re-entered June 16, 2018
  • Flock 2e-2 · NORAD 41484 · re-entered January 23, 2018
  • Flock 2e-3 · NORAD 41486 · re-entered April 5, 2018
  • Flock 2e-4 · NORAD 41487 · re-entered March 11, 2018
Show 9 more payloads
  • Flock 2e-6 · NORAD 41563
  • Flock 2e-5 · NORAD 41564
  • Flock 2e-7 · NORAD 41565
  • Flock 2e-8 · NORAD 41566
  • Flock 2e-9 · NORAD 41571
  • Flock 2e-10 · NORAD 41572
  • Flock 2e-12 · NORAD 41573
  • Flock 2e-11 · NORAD 41574
  • SIMPL · NORAD 42983

Data from J. McDowell, planet4589.org

About this launch

This is the 4th mission under NASA's Commercial Resupply Service agreement with Orbital ATK. The unmanned Cygnus cargo vessel delievered approximately 3,500 kg (7,700 lbs.) of supplies and science experiments to the International Space Station. The craft features a longer, enhanced cargo module and remained berthed to the station for 2 months.

Pad

Map of Space Launch Complex 41

Space Launch Complex 41, Cape Canaveral SFS, FL, USA

76th launch from Space Launch Complex 41, 8th this year · 735th from Cape Canaveral SFS, FL, USA

125 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA

36 days after the previous launch from this pad

All launches from Cape Canaveral SFS, FL, USAOpen in maps

Questions

When did Cygnus CRS Orb-4 (S.S. Deke Slayton II) launch?

Cygnus CRS Orb-4 (S.S. Deke Slayton II) launched on December 6, 2015. The time is known to the hour, not the minute.

Where can I watch Cygnus CRS Orb-4 (S.S. Deke Slayton II)?

Coverage: Atlas V OA-4 Launch Highlights. Watch the replay

What rocket launched Cygnus CRS Orb-4 (S.S. Deke Slayton II)?

Atlas V 401, flown by United Launch Alliance. Atlas V 401 spec sheet

Where did Cygnus CRS Orb-4 (S.S. Deke Slayton II) launch from?

Space Launch Complex 41, Cape Canaveral SFS, FL, USA.

What orbit did Cygnus CRS Orb-4 (S.S. Deke Slayton II) reach?

SS Deke Slayton II, one of 21 catalogued objects, reached a 241 × 245 km orbit inclined 51.7°.

How many satellites did Cygnus CRS Orb-4 (S.S. Deke Slayton II) launch?

21 payloads from this launch are catalogued (Data from J. McDowell, planet4589.org).

Which program is Cygnus CRS Orb-4 (S.S. Deke Slayton II) part of?

Commercial Resupply Services and International Space Station. About Commercial Resupply Services