Minotaur IV

Minotaur IV
Minotaur IV
Launch of the first Minotaur IV Lite
Launch of the first Minotaur IV Lite
Function Expendable launch system
Manufacturer Orbital Sciences
Cost per launch (2011) $50 million[1]
Size
Height 23.88 metres (78.3 ft)
Diameter 2.34 metres (7 ft 8 in)
Mass 86,300 kg
Stages 4
Capacity
Payload to
LEO
1735 kg (28.5 deg, 185 km)
Associated rockets
Family Minotaur
Derivatives Minotaur V
Launch history
Status Active
Launch sites SLC-8, Vandenberg AFB
LP-0B, MARS
LP-1, Kodiak
Total launches 4
Successes 4
Maiden flight 22 April 2010
First Stage - SR-118
Engines 1 Solid
Thrust 2,200 kilonewtons (490,000 lbf)
Fuel Solid
Second Stage - SR-119
Engines 1 Solid
Thrust 1,365 kilonewtons (307,000 lbf)
Burn time 54 seconds
Fuel Solid
Third Stage - SR-120
Engines 1 Solid
Thrust 329 kilonewtons (74,000 lbf)
Burn time 62 seconds
Fuel Solid
Fourth Stage (Baseline) - Orion-38
Engines 1 Solid
Thrust 32.2 kilonewtons (7,200 lbf)
Burn time 67.7 seconds
Fuel Solid
Fourth Stage (Optional) - Star-48V
Engines 1 Solid
Thrust 68.6 kilonewtons (15,400 lbf)
Burn time 84.1 seconds
Fuel Solid

Minotaur IV, also known as Peacekeeper SLV and OSP-2 PK is an active expendable launch system derived from the Peacekeeper missile. It is operated by Orbital Sciences Corporation, and made its maiden flight on 22 April 2010, carrying the HTV-2a Hypersonic Test Vehicle.[2][3][4] The first orbital launch, occurred on 26 September 2010 with the SBSS satellite for the United States Air Force.

The Minotaur IV vehicle consists of four stages and is capable of placing 1,735 kilograms (3,830 lb) of payload into a Low Earth orbit (LEO).[5][6] It uses the first three stages of the Peacekeeper missile, combined with a new upper stage. On the baseline version, the fourth stage is an Orion-38. However a higher performance variant, designated Minotaur IV+, uses a Star-48V instead. A three stage configuration (no Orion-38), designated the Minotaur IV Lite, is available for Suborbital trajectories. A five stage derivative, the Minotaur V, is also under development.

Minotaur IV launches will be conducted from SLC-8 at Vandenberg Air Force Base, LP-0B at the Mid-Atlantic Regional Spaceport, and Pad 1 of the Kodiak Launch Complex.

Launches

Date/Time (UTC) Variant Launch Site Payload Trajectory Outcome Remarks
22 April 2010
23:00
Minotaur IV Lite Vandenberg SLC-8 HTV-2a Suborbital Successful Successful launch, but payload failed
26 September 2010[7]
04:41
Minotaur IV Vandenberg SLC-8 SBSS SSO Successful
19 Nov 2010[7] Minotaur IV HAPS Kodiak LP-1 STPSat-2
FASTRAC-A
FASTRAC-B
FalconSat-5
FASTSAT
O/OREOS
RAX
NanoSail-D2
LEO Successful STP-S26 launch. Included a Hydrazine Auxiliary
Propulsion System (HAPS) to take
the vehicle to a secondary orbit after
placing payloads into the primary orbit
11 Aug 2011[8] Minotaur IV Lite Vandenberg SLC-8 HTV-2b Suborbital Successful Successful launch, but payload failed
27 September 2011 Minotaur IV+ Kodiak LP-1 TacSat-4 LEO Successful First Minotaur IV+ launch
Scheduled Launches
4th Q 2012 Minotaur IV Vandenberg SLC-8 TacSat-5 LEO Might launch on a Minotaur I
1st Q 2013 Minotaur IV Lite Vandenberg SLC-8 CSM[disambiguation needed ] Suborbital

References


Wikimedia Foundation. 2010.

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