H-2A R/B (42739)

COSPAR: 2017-028B | Alt Name: H-2A F34 Stage 2

Image
H-2A R/B Satellite Image
Additional Sources
Launch Details

Launch Date

June 1, 2017

Launch Site

TANSC

Launch Pad

Y

Launch Vehicle

H-IIA 202

Orbital Elements

NORAD ID

42739

International Designator

2017-028B

Epoch

Sat, 04 Jul 2026 04:18:44 GMT

Apogee

Calculating...

Perigee

Calculating...

Inclination

31.39°

Right Ascension

163.60°

Eccentricity

Calculating...

Argument of Perigee

229.21°

Period

593.80 min

Mean Motion

2.43 rev/day

Latitude

Calculating...

Longitude

Calculating...

Altitude

Calculating...

Velocity

Calculating...

Polar Plot
3D Visualization
Basic Satellite Info

Name

H-2A R/B

Alternative Name

H-2A F34 Stage 2

Type

Rocket Body

Status

Space Junk

Owner

MHI

Country

Japan

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 42739U 17028B   26185.17968332  .00000655  00000-0  60866-3 0  9999
2 42739  31.3911 163.5956 7140154 229.2067  42.8801  2.42506655 77899

Source: Celestrak

Summary
A rocket body, also commonly referred to as an upper stage or spent rocket stage, is the structural shell left behind after a rocket has delivered its payload to orbit. These large and often heavy pieces of space hardware can remain in orbit for years, posing significant collision hazards as part of the growing space debris problem. If left uncontrolled, rocket bodies have the potential to reenter Earth's atmosphere unpredictably, which can lead to falling debris in populated areas. Additionally, they risk colliding with operational satellites or the International Space Station, creating more debris and putting human life at risk.
Physical Characteristics

Length

9.2

Diameter

4

Span

9.2

Dry Mass

4000

Launch Mass

4000

Shape

Cyl

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

H-2A Stage 2

Purpose

Unknown

Mission

Unknown

Manufacturer

MHITO

Life Expectancy

Unknown

Bus

H-2A Stage 2

Configuration

Unknown

Motor

Unknown

Equipment

Unknown

Power System

Unknown

ADCS

Unknown

Transmitter Frequency

Unknown

Map
This tool will help you track the satellite's position and predict its upcoming passes over your location. Simply input the coordinates or click the geolocation button to get started.
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

Nuclear Renaissance Surges in Space, Pentagon Invests $1B in L3Harris Missiles | KeepTrack Space Brief

Nuclear Renaissance Surges in Space, Pentagon Invests $1B in L3Harris Missiles | KeepTrack Space Brief

Demand surges for nuclear power in space including lunar surface reactors. Pentagon commits $1B as anchor investor in L3Harris missile unit. Orbion delivers 33 electric thrusters for military sats.

Space Brief 21 Sep 2025

Space Brief 21 Sep 2025

Today's Space Brief covers a significant signals intelligence launch, a record-breaking satellite deployment in China, a glimpse into the newest stealth drone, a potential delay for NASA's lunar lander, and more exciting updates from satellite world.

X Report 28 Mar 2025

X Report 28 Mar 2025

SpaceX sees another successful Starlink launch and faces strategic contract discussions as NASA pivots to reliable Dragon missions.

Space Brief 18 Apr 2025

Space Brief 18 Apr 2025

Today's highlights include a Minotaur IV launch of U.S. spy satellites, Rocket Lab's new defense contracts, and the unveiling of Space Force's warfighting framework. Plus, the Satellite Spotlight dives into METEOR 3-1.

Musk Confirms Starmind AI Constellation, X Report 24 Jun 2026

Musk Confirms Starmind AI Constellation, X Report 24 Jun 2026

Musk confirms Starmind, an AI satellite constellation targeting 1 million orbital compute nodes. Starfall's debut and Dragon's ISS departure follow.

X Report 3 Apr 2025

X Report 3 Apr 2025

Exciting advancements from SpaceX's Fram2 mission and the pivotal role of biotech in space exploration.

Block 3 Starship Pad Work Accelerates at Starbase | KeepTrack X Report

Block 3 Starship Pad Work Accelerates at Starbase | KeepTrack X Report

SpaceX engineers are overhauling Starbase launch infrastructure for Block 3 Starships as Falcon 9 prepares another Starlink batch run.

Kratos Wins $446M Space Force Missile-Warning Contract | KeepTrack Space Brief

Kratos Wins $446M Space Force Missile-Warning Contract | KeepTrack Space Brief

Kratos Defense awarded $446M Space Force contract for RMWT missile-warning ground systems. Rocket Lab secures $190M Pentagon deal for 20 hypersonic test flights.