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Key events during the H-2A rocket launch with Himawari 9

Japan’s Himawari 9 weather satellite will ride into space atop an H-2A rocket from Tanegashima Space Center and reach a preliminary geostationary transfer orbit within 28 minutes of liftoff.

The 7,700-pound (3,500-kilogram) satellite will blast off from Launch Pad No. 1 at the Yoshinobu launch complex at Tanegashina Space Center, a picturesque spaceport carved on the southern edge of Tanegashima Island in southern Japan.

The H-2A rocket carrying Himawari 8 will head east over the Pacific Ocean, dropping its two solid-fueled boosters, nose cone, and a cryogenic core stage in the sea before its upper stage delivers the weather observatory to an orbit stretching more than 22,000 miles above Earth.

A list of the major events during the launch, set for 0620 GMT (2:20 a.m. EDT) Wednesday, is provided below.

Data source: JAXA

T-00:00: Liftoff

With its LE-7A main engine and two solid rocket boosters firing, the 174-foot-tall H-2A rocket lifts off from the Yoshinobu launch complex on Tanegashima Island. A few moments later, the rocket will complete a pitch program to head east from the launch site.
With its LE-7A main engine and two solid rocket boosters firing, the 174-foot-tall H-2A rocket lifts off from the Yoshinobu launch complex on Tanegashima Island. A few moments later, the rocket will complete a pitch program to head east from the launch site.

T+01:38: SRB-A Burnout

The H-2A's two solid rocket boosters exhaust their propellant and burn out at an altitude of 28 miles (45 kilometers).
The H-2A’s two solid rocket boosters exhaust their propellant and burn out at an altitude of 28 miles (45 kilometers).

T+01:48: SRB-A Jettison

The two solid rocket boosters are jettisoned at an altitude of 33 miles (53 kilometers).
The two solid rocket boosters are jettisoned at an altitude of 33 miles (53 kilometers).

T+04:05: Fairing Separation

After traversing the dense lower atmosphere and reaching an altitude of 88 miles (142 kilometers), the rocket releases the 4-meter (13.1-foot) diameter payload fairing protecting the Himawari 9 spacecraft during the early part of the flight.
After traversing the dense lower atmosphere and reaching an altitude of 88 miles (142 kilometers), the rocket releases the 4-meter (13.1-foot) diameter payload fairing protecting the Himawari 9 spacecraft during the early part of the flight.

T+06:36: Main Engine Cutoff

After consuming its liquid hydrogen and liquid oxygen propellants, the LE-7A first stage main engine shuts down. The first stage and solid rocket boosters push the rocket to a velocity of nearly 11,000 mph (4.9 kilometers per second)
After consuming its liquid hydrogen and liquid oxygen propellants, the LE-7A first stage main engine shuts down. The first stage and solid rocket boosters push the rocket to a velocity of nearly 11,000 mph (4.9 kilometers per second).

T+06:44: Stage Separation

The H-2A rocket's first stage is separated now, having completed its job. The spent stage will fall into the Pacific Ocean downrange from Tanegashima.
The H-2A rocket’s first stage is separated now, having completed its job. The spent stage will fall into the Pacific Ocean downrange from Tanegashima.

T+06:50: Second Stage Ignition

With the first stage jettisoned, the rocket's second stage takes over. The LE-5B hydrogen-fueled engine ignites at an altitude of 140 miles (225 kilometers) to accelerate the Himawari 9 payload to orbital velocity.
With the first stage jettisoned, the rocket’s second stage takes over. The LE-5B hydrogen-fueled engine ignites at an altitude of 140 miles (225 kilometers) to accelerate the Himawari 9 payload to orbital velocity.

T+12:12: SECO 1

The LE-5B second stage engine shuts down after reaching a parking orbit with the Himawari 9 satellite. The second stage will coast for nearly 12 minutes before restarting to boost the spacecraft into geostationary transfer orbit.
The LE-5B second stage engine shuts down after reaching a parking orbit with the Himawari 9 satellite. The second stage will coast for nearly 12 minutes before restarting to boost the spacecraft into geostationary transfer orbit.

T+23:50: Second Stage Restart

The LE-5B second stage engine reignites for a 3-minute, 17-second burn.
The LE-5B second stage engine reignites for a 3-minute, 17-second burn.

T+27:07: SECO 2

The H-2A rocket's LE-5B second stage engine shuts down after reaching an orbit with a high point of 35,976 kilometers (22,354 miles), a low point of 250 kilometers (155 miles), and an inclination of 22.4 degrees.
The H-2A rocket’s LE-5B second stage engine shuts down after reaching an orbit with a high point of 35,976 kilometers (22,354 miles), a low point of 250 kilometers (155 miles), and an inclination of 22.4 degrees.

T+27:57: Himawari 9 Separation

The 7,716-pound Himawari 8 weather satellite separates from the H-2A rocket's second stage to complete the launch. Himawari 9 is designed for an eight-year weather observation mission for the Japan Meteorological Agency.
The 7,716-pound Himawari 8 weather satellite separates from the H-2A rocket’s second stage to complete the launch. Himawari 9 is designed for an eight-year weather observation mission for the Japan Meteorological Agency.

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Follow Stephen Clark on Twitter: @StephenClark1.

Source: You’ll find lots of information about the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Also we have facts about the space station, ISS, SpaceX launch, space program, and outerspace. Space Flight

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Key events during the H-2A rocket launch with Himawari 9

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