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United States Air ForceDelta II 7920-10CSpace Launch Complex 2W, Vandenberg SFB, CA, USA
Iridium 55 to 60
Launched
March 30, 1998
Summary
Iridium 55 to 60 launched on an United States Air Force Delta II 7920-10C from Space Launch Complex 2W, Vandenberg SFB, CA, USA on March 30, 1998. It was United States Air Force's 991st launch, 4th this year and humanity's 4,227th orbital launch attempt. It was the 8th Delta II 7920-10C flight and the 2nd this year. The payload was bound for low Earth orbit (LEO). Iridium 55, one of 8 catalogued objects, reached a 626 × 646 km orbit inclined 86.6°. 8 objects from this launch are catalogued, 5 of them payloads.
- Watch
- No webcast on record.
- Vehicle
- Delta II 7920-10C · United States Air ForceIridium Constellation
- Booster
- No booster details on record.
- Mission
- Communications · Low Earth Orbit (LEO)
- Milestone
- 8th Delta II 7920-10C flight · 2nd this yearUnited States Air Force's 991st launch4th this yearhumanity's 4,227th orbital launch attempt20th orbital launch attempt this year
Flight preview
Orbit: as tracked
Iridium 55 · NORAD 25272 · 1998-019 · Space-Track · tracking 1 of 8 objects
Show the numbers for orbit elements
- Object
- IRIDIUM 55
- Object ID
- 1998-019A
- Epoch
- 1998-03-30 07:01:50 UTC
- Mean motion
- 14.80036749 rev/day
- Eccentricity
- 0.0014421
- Inclination
- 86.5698°
- Ascending node
- 340.0566°
- Arg. of perigee
- 252.3795°
- Mean anomaly
- 107.6501°
- 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
8 catalogued: 5 payloads, 1 rocket stage, 2 components; 1 still in orbit
- Iridium 55 · NORAD 25272 · re-entered March 31, 2019
- Iridium 57 · NORAD 25273 · in orbit
- Iridium 58 · NORAD 25274 · re-entered April 7, 2019
- Iridium 59 · NORAD 25275 · re-entered March 11, 2019
- Iridium 60 · NORAD 25276 · re-entered March 17, 2019
Delta 255 · re-entered May 11, 1998
Data from J. McDowell, planet4589.org
About this launch
Iridium provides global mobile telecommunications services using a constellation of 66 low earth orbit satellites in a 86.4° inclined orbit. Although 77 satellites were originally envisioned for the system and spawned the name based on the 77th element in the periodic table, the system has been scaled back. Motorola's Satellite Communications Group designed and manufactured the Iridium satellites with Lockheed Martin providing the LM-700A spacecraft buses.
Pad
Space Launch Complex 2W, Vandenberg SFB, CA, USA
58th launch from Space Launch Complex 2W, 2nd this year · 583rd from Vandenberg SFB, CA, USA
99 launches from this pad · 919 from Vandenberg SFB, CA, USA
39 days after the previous launch from this pad
Questions
When did Iridium 55 to 60 launch?
Iridium 55 to 60 launched on March 30, 1998. The time is known to the hour, not the minute.
Where can I watch Iridium 55 to 60?
No webcast is on record for this launch.
What rocket launched Iridium 55 to 60?
Delta II 7920-10C, flown by United States Air Force. Delta II 7920-10C spec sheet
Where did Iridium 55 to 60 launch from?
Space Launch Complex 2W, Vandenberg SFB, CA, USA.
What orbit did Iridium 55 to 60 reach?
Iridium 55, one of 8 catalogued objects, reached a 626 × 646 km orbit inclined 86.6°.
How many satellites did Iridium 55 to 60 launch?
5 payloads from this launch are catalogued, 1 of them still in orbit (Data from J. McDowell, planet4589.org).
Which program is Iridium 55 to 60 part of?
Iridium Constellation. About Iridium Constellation