Mitsubishi Heavy IndustriesH-IOsaki Launch Complex, Tanegashima Space Center, Japan
Momo 1b
Launched
February 7, 1990
Summary
Momo 1b launched on a Mitsubishi Heavy Industries H-I from Osaki Launch Complex, Tanegashima Space Center, Japan on February 7, 1990. It was Mitsubishi Heavy Industries's 6th launch, 1st this year and humanity's 3,489th orbital launch attempt. It was the 6th H-I flight and the 1st this year. The payload was bound for low Earth orbit (LEO). Momo-1B, one of 4 catalogued objects, reached a 781 × 814 km orbit inclined 98.6°. 4 objects from this launch are catalogued, 3 of them payloads.
- Watch
- No webcast on record.
- Vehicle
- H-I · Mitsubishi Heavy Industries
- Booster
- No booster details on record.
- Mission
- Earth Science · Low Earth Orbit (LEO)
- Milestone
- 6th H-I flight · 1st this yearMitsubishi Heavy Industries's 6th launch1st this yearhumanity's 3,489th orbital launch attempt13th orbital launch attempt this year
Flight preview
Orbit: as tracked
Momo-1B · NORAD 20478 · 1990-013 · Space-Track · tracking 1 of 4 objects
Show the numbers for orbit elements
- Object
- MOS 1B (MOMO 1B)
- Object ID
- 1990-013A
- Epoch
- 1990-02-07 02:44:57 UTC
- Mean motion
- 14.30349766 rev/day
- Eccentricity
- 0.0022637
- Inclination
- 98.6104°
- Ascending node
- 110.3858°
- Arg. of perigee
- 218.988°
- Mean anomaly
- 140.9672°
- 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: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
4 catalogued: 3 payloads, 1 rocket stage; 4 still in orbit
- Momo-1B · NORAD 20478 · in orbit
- Orizuru · NORAD 20479 · in orbit
- Fuji-OSCAR-20 · NORAD 20480 · in orbit
H-I-21F Stage 2 · in orbit
Data from J. McDowell, planet4589.org
About this launch
Japanese Earth observation satellite
Pad

Osaki Launch Complex, Tanegashima Space Center, Japan
21st launch from Osaki Launch Complex, 1st this year · 21st from Tanegashima Space Center, Japan
24 launches from this pad · 99 from Tanegashima Space Center, Japan
154 days after the previous launch from this pad
All launches from Tanegashima Space Center, JapanOpen in maps
Questions
When did Momo 1b launch?
Momo 1b launched on February 7, 1990. The time is known to the hour, not the minute.
Where can I watch Momo 1b?
No webcast is on record for this launch.
What rocket launched Momo 1b?
H-I, flown by Mitsubishi Heavy Industries. H-I spec sheet
Where did Momo 1b launch from?
Osaki Launch Complex, Tanegashima Space Center, Japan.
What orbit did Momo 1b reach?
Momo-1B, one of 4 catalogued objects, reached a 781 × 814 km orbit inclined 98.6°.
How many satellites did Momo 1b launch?
3 payloads from this launch are catalogued, 3 of them still in orbit (Data from J. McDowell, planet4589.org).
![[AUTO] H-1 - image](/media?u=https%3A%2F%2Fthespacedevs-prod.nyc3.digitaloceanspaces.com%2Fmedia%2Fimages%2Fh-1_image_20240210175424.png&w=1600)