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H3 (rocket)

The H3 is a Japanese medium-lift launch vehicle developed by JAXA and Mitsubishi Heavy Industries (MHI). A hydrolox-fuelled rocket, it is the successor to the H-IIA and H-IIB launch vehicles. The H3 uses the LE-9 main engine, which was designed to be less expensive to produce as part of a broader effort to lower launch costs. The rocket has a modular…

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Altitude
420 km (260 mi) · 500 km (310 mi)
Based on
H-IIA · H-IIB
Burn time
110 seconds · 300 or 225 seconds · 699 seconds
Carries passengers or cargo
ALOS-4 · HTV-X · IGS · QZSS
Comparable
Ariane 6 · Atlas V · Falcon 9 · Long March 7 8 12 · 7
Cost per launch
H3‑30: ¥5 billion (2023) (equivalent to ¥5.13 billion or US$33.92 million in 2024)

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Overview

Development

Vehicle description

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Map overview Semantic statistics

H3 (rocket)

Nodes46
Edges45
Triples64
Avg. degree1.96
Density0.043478
Components1

How this topic connects Entity context

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H3 (rocket)

Top relations

Comparable · 10
H3 (rocket) → 12, 7, 8, Ariane 6, Atlas V, Falcon 9, Long March 7 8 12, LVM3, Soyuz-2, Vulcan Centaur
Mass · 6
H3 (rocket) → H3‑22: 420 t (930,000 lb), H3‑24: 16,000 kg (35,000 lb), H3‑24: 575 t (1,268,000 lb), H3‑24: 7,900 kg (17,400 lb), H3‑30: 271 t (597,000 lb), H3‑30: 4,000 kg (8,800 lb)
Height · 5
H3 (rocket) → 12 m (39 ft), 15 m (49 ft), 37 m (121 ft), With L or W fairing: 63 m (207 ft), With S fairing: 57 m (187 ft)
Carries passengers or cargo · 4
H3 (rocket) → ALOS-4, HTV-X, IGS, QZSS
Burn time · 3
H3 (rocket) → 110 seconds, 300 or 225 seconds, 699 seconds
Gross mass · 3
H3 (rocket) → 241 t (531,000 lb), 28 t (62,000 lb), 76.2 t (168,000 lb) each
Maximum thrust · 3
H3 (rocket) → 137 kN (31,000 lbf), 2,300 kN (520,000 lbf) each, 2,942 or 4,413 kN (661,000 or 992,000 lbf)
Propellant mass · 3
H3 (rocket) → 226 t (498,000 lb), 24.6 t (54,000 lb), 67.2 t (148,000 lb) each
Specific impulse · 3
H3 (rocket) → 283.6 s (2.781 km/s), 425 s (4.17 km/s), 448 s (4.39 km/s)
Altitude · 2
H3 (rocket) → 420 km (260 mi), 500 km (310 mi)

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Important terminology

h3 launch le-9 first vehicle engine flight rocket used jaxa engines second stage boosters launches mhi 000 lb development planned

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
H3 (rocket)Altitude420 km (260 mi)1.00infobox
H3 (rocket)Altitude500 km (310 mi)1.00infobox
H3 (rocket)Based onH-IIA · H-IIB1.00infobox
H3 (rocket)Burn time110 seconds1.00infobox
H3 (rocket)Burn time300 or 225 seconds1.00infobox
H3 (rocket)Burn time699 seconds1.00infobox
H3 (rocket)Carries passengers or cargoALOS-41.00infobox
H3 (rocket)Carries passengers or cargoHTV-X1.00infobox
H3 (rocket)Carries passengers or cargoIGS1.00infobox
H3 (rocket)Carries passengers or cargoQZSS1.00infobox
H3 (rocket)ComparableAriane 61.00infobox
H3 (rocket)ComparableAtlas V1.00infobox
H3 (rocket)ComparableFalcon 91.00infobox
H3 (rocket)ComparableLong March 7 8 121.00infobox
H3 (rocket)Comparable71.00infobox
H3 (rocket)Comparable81.00infobox
H3 (rocket)Comparable121.00infobox
H3 (rocket)ComparableLVM31.00infobox
H3 (rocket)ComparableSoyuz-21.00infobox
H3 (rocket)ComparableVulcan Centaur1.00infobox
H3 (rocket)Cost per launchH3‑30: ¥5 billion (2023) (equivalent to ¥5.13 billion or US$33.92 million in 2024)1.00infobox
H3 (rocket)Country of originJapan1.00infobox
H3 (rocket)Diameter5.27 m (17.3 ft)1.00infobox
H3 (rocket)Diameter2.5 m (8 ft 2 in)1.00infobox
H3 (rocket)Failure21.00infobox
H3 (rocket)First flight7 March 20231.00infobox
H3 (rocket)FunctionMedium-lift launch vehicle1.00infobox
H3 (rocket)Gross mass76.2 t (168,000 lb) each1.00infobox
H3 (rocket)Gross mass241 t (531,000 lb)1.00infobox
H3 (rocket)Gross mass28 t (62,000 lb)1.00infobox

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