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United Launch AllianceDelta II 7920H-10CSpace Launch Complex 17B, Cape Canaveral SFS, FL, USA
GRAIL-A (Ebb) & GRAIL-B (Flow)
Launched
September 10, 2011
Summary
GRAIL launched on an United Launch Alliance Delta II 7920H-10C from Space Launch Complex 17B, Cape Canaveral SFS, FL, USA on September 10, 2011. It was United Launch Alliance's 55th launch, 9th this year and humanity's 5,155th orbital launch attempt. It was the 2nd Delta II 7920H-10C flight and the 1st this year. The payload was bound for Lunar Orbit (LO). Ebb, one of 3 catalogued objects, reached a 169 × 170 km orbit inclined 28.5°. 3 objects from this launch are catalogued, 2 of them payloads.
- Watch
- Delta II GRAIL Launch HighlightsUnited Launch Alliance
- Booster
- No booster details on record.
- Mission
- Lunar Exploration · Lunar Orbit (LO)
- Milestone
- 2nd Delta II 7920H-10C flight · 1st this yearUnited Launch Alliance's 55th launch9th this yearhumanity's 5,155th orbital launch attempt49th orbital launch attempt this year
Flight preview
Orbit: as tracked
Ebb · NORAD 37801 · 2011-046 · Space-Track · tracking 1 of 3 objects
Show the numbers for orbit elements
- Object
- GRAIL A
- Object ID
- 2011-046A
- Epoch
- 2011-09-10 14:16:19 UTC
- Mean motion
- 16.41337653 rev/day
- Eccentricity
- 0.00002
- Inclination
- 28.5°
- Ascending node
- 9.1212°
- Arg. of perigee
- 263.4759°
- Mean anomaly
- 96.5843°
- Element set
- 999
- Rev at epoch
- 0
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LO. Ascent drawn from padside's representative profile.
Catalogued objects
3 catalogued: 2 payloads, 1 rocket stage
- Ebb · NORAD 37801 · left Earth orbit September 11, 2011
- Flow · NORAD 37802 · left Earth orbit September 11, 2011
Delta 356 · left Earth orbit September 11, 2011
Data from J. McDowell, planet4589.org
About this launch
The Gravity Recovery and Interior Laboratory was a NASA Discovery mission of twin spacecraft, Ebb and Flow, that flew in formation around the Moon and mapped its gravity field in unprecedented detail to reveal the lunar interior.
Pad
Space Launch Complex 17B, Cape Canaveral SFS, FL, USA
132nd launch from Space Launch Complex 17B, 1st this year · 682nd from Cape Canaveral SFS, FL, USA
132 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
715 days after the previous launch from this pad
Questions
When did GRAIL launch?
GRAIL launched on September 10, 2011. The time is known to the hour, not the minute.
Where can I watch GRAIL?
Coverage: Delta II GRAIL Launch Highlights. Watch the replay
What rocket launched GRAIL?
Delta II 7920H-10C, flown by United Launch Alliance. Delta II 7920H-10C spec sheet
Where did GRAIL launch from?
Space Launch Complex 17B, Cape Canaveral SFS, FL, USA.
What orbit did GRAIL reach?
Ebb, one of 3 catalogued objects, reached a 169 × 170 km orbit inclined 28.5°.
How many satellites did GRAIL launch?
2 payloads from this launch are catalogued (Data from J. McDowell, planet4589.org).
Which program is GRAIL part of?
Discovery Program. About Discovery Program