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Launch detail

Zenit | DemoSat

Name: Zenit | DemoSat
Start: 1999-03-28T01:29:59.000Z
End: 1999-03-28T01:29:59.000Z
Location: Launch Platform Odyssey

Sea Launch • Zenit 3SL • Launch Platform Odyssey (NA)

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SuccessROUTINE

DemoSat

Sea Launch • Zenit 3SL • Launch Platform Odyssey

T- countdown

DemoSat was the dummy payload on the first Boeing Sea Launch mission. The Zenit-3SL booster rocket lifted off from the Odyssey floating platform on the equator at 154 degrees W longitude.

Rocket profile

Zenit 3SL

Variant: 3SL

Length: 4.6 m

Diameter: 0.42 m

Reusable: No

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Vehicle timeline

Zenit 3SL launches across time.

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Launch info

Provider

Sea Launch

Vehicle

Zenit 3SL

Pad

Launch Platform Odyssey (Launch Platform Odyssey)

State

NET

1999-03-28T01:29:59+00:00

Window start

1999-03-28T01:29:59+00:00

Window end

1999-03-28T01:29:59+00:00

Orbit

Elliptical Orbit

Mission type

Test Flight

Launch site

Sea Launch

Reusable

Pad satellite view

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Satellite preview

Launch Platform Odyssey

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Sea Launch0.00000, -154.00000Provider map

DemoSat

DemoSat was the dummy payload on the first Boeing Sea Launch mission. The Zenit-3SL booster rocket lifted off from the Odyssey floating platform on the equator at 154 degrees W longitude.

Rocket

Zenit 3SL

Manufacturer: Sea Launch

Maiden flight

1999-03-28

Links & sources

Pad satellite mapSatellite

Service provider

Sea Launch

Provider news

Commercial • RUS

Objects from this launch

2 objects

SATCAT inventory for 1999-014

Last checked: 2026-03-14T06:11:00.846+00:00

Last success: 2026-03-14T06:11:00.846+00:00

Last non-empty: 2026-03-14T06:11:00.846+00:00

Latest snapshot: 2026-03-14T06:11:00.846+00:00

Snapshot hash: b7dd20c92dd863a3c9df9c4d4f8d651323a1b7bc8b64e9fda0f4cde3b5d2daf8

LL2 payloads: 0SATCAT payloads: 1Delta: +1RB: 1DEB: 0UNK: 0

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SATCAT payload objects

SEA LAUNCH DEMO
1999-014ANORAD 25661PAYSEAL
Technical details
Orbit type: ORBOrbit center: EALaunch site: SEALPeriod: 645.00 minRCS: 5.667 m²
Inc: 1.7°
636 km → 36065 km

SATCAT non-payload objects

BLOCK DM-SL R/B
1999-014BNORAD 25662RBSEAL
Technical details
Orbit type: ORBOrbit center: EALaunch site: SEALPeriod: 641.77 minRCS: 20.907 m²
Inc: 1.3°
585 km → 35951 km

Change log

Launch update history

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Detected

Summary

Details

Update 1

NET updated

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Update 2

Status changed

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Update 3

Window refined

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Launch story

Mission stats

Provider, rocket, pad, and booster history tied to this launch.

2026 snapshot

Provider legacy

Sea Launch

Lifetime launches

1 in 2026

Sea Launch has 1 launches on record, with 1 in 2026.

Rocket track record

Zenit 3SL

Successful missions

0 in 2026

Zenit 3SL has 33 successful missions on record, with 0 in 2026.

Pad history

Launch Platform Odyssey

Pad launches

1 in 2026

Launch Platform Odyssey has 1 launches from this pad on record, with 1 in 2026.

Rocket reliability

92% all time

2026: no completed missions yet

Pad turnaround

Reported pad reuse cadence.

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