Mitsubishi Heavy IndustriesH-IIA 204Yoshinobu Launch Complex LP-1, Tanegashima Space Center, Japan
Inmarsat-6 F1
Launched
December 22, 2021

Image: JAXA
Summary
Inmarsat-6 F1 launched on a Mitsubishi Heavy Industries H-IIA 204 from Yoshinobu Launch Complex LP-1, Tanegashima Space Center, Japan on December 22, 2021. It was Mitsubishi Heavy Industries's 46th launch, 2nd this year and humanity's 6,174th orbital launch attempt. It was the 5th H-IIA 204 flight and the 1st this year. The payload was bound for Geostationary Transfer Orbit (GTO). Inmarsat 6 F1, one of 2 catalogued objects, reached a 154 × 63,523 km orbit inclined 30.1°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- Live streaming for the launch of H-IIA F45 with I-6 F1/ H-IIAロケット45号機による通信衛星Inmarsat-6 F1 打上げライブ中継DiscoverMHI (Mitsubishi Heavy Industries, Ltd.)
- Inmarsat-6 F1 launchInmarsat
- Vehicle
- H-IIA 204 · Mitsubishi Heavy Industries
- Booster
- No booster details on record.
- Mission
- Communications · Geostationary Transfer Orbit (GTO)
- Milestone
- 5th H-IIA 204 flight · 1st this yearMitsubishi Heavy Industries's 46th launch2nd this yearhumanity's 6,174th orbital launch attempt137th orbital launch attempt this year
Webcast
Flight preview
Orbit: as tracked
Inmarsat 6 F1 · NORAD 50319 · 2021-128 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 2021-128A
- Epoch
- 2021-12-22 17:40:37 UTC
- Mean motion
- 1.16237002 rev/day
- Eccentricity
- 0.8292296
- Inclination
- 30.1137°
- Ascending node
- 1.7366°
- Arg. of perigee
- 171.1466°
- Mean anomaly
- 30.2258°
- 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: GTO. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; 1 still in orbit
- Inmarsat 6 F1 · NORAD 50319 · in orbit
H-2A F45 Stage 2 · re-entered February 9, 2022
Data from J. McDowell, planet4589.org
About this launch
Inmarsat-6 is the sixth generation of satellites for the London-based global mobile satellite communications operator Inmarsat. It consists of a dual mission to augment both L-band and Ka-band Global Xpress services. Airbus Defence and Space has been awarded a contract by Inmarsat to design and develop the first two Inmarsat-6 (I-6) mobile communications satellites, creating the most versatile mobile services satellites in its fleet. The two I-6 satellites are based on Airbus Defence and Space's Eurostar platform in its E3000e variant, which exclusively uses electric propulsion for orbit raising. The satellites take advantage of the reduction in mass that this electric propulsion technology enables for a dual payload mission, with an exceptionally large next generation digitally processed payload. I-6 F1 and F2 both carry a large 9 m aperture L-band antenna and nine multibeam Ka-band antennas, and feature a high level of flexibility and connectivity. A new generation modular digital processor provides full routing flexibility over up to 8000 channels and dynamic power allocation to over 200 spot beams in L-band. Ka-band spot beams are steerable over the full Earth disk, with flexible channel to beam allocation.
Pad

Yoshinobu Launch Complex LP-1, Tanegashima Space Center, Japan
52nd launch from Yoshinobu Launch Complex LP-1, 2nd this year · 85th from Tanegashima Space Center, Japan
57 launches from this pad · 99 from Tanegashima Space Center, Japan
57 days after the previous launch from this pad
All launches from Tanegashima Space Center, JapanOpen in maps
Updates
Questions
When did Inmarsat-6 F1 launch?
Inmarsat-6 F1 launched on December 22, 2021. The time is known to the hour, not the minute.
Where can I watch Inmarsat-6 F1?
Coverage: Live streaming for the launch of H-IIA F45 with I-6 F1/ H-IIAロケット45号機による通信衛星Inmarsat-6 F1 打上げライブ中継; Inmarsat-6 F1 launch. Watch the replay
What rocket launched Inmarsat-6 F1?
H-IIA 204, flown by Mitsubishi Heavy Industries. H-IIA 204 spec sheet
Where did Inmarsat-6 F1 launch from?
Yoshinobu Launch Complex LP-1, Tanegashima Space Center, Japan.
What orbit did Inmarsat-6 F1 reach?
Inmarsat 6 F1, one of 2 catalogued objects, reached a 154 × 63,523 km orbit inclined 30.1°.
How many satellites did Inmarsat-6 F1 launch?
1 payload from this launch is catalogued, still in orbit (Data from J. McDowell, planet4589.org).
