DUPLEX

NORAD 66906· COSPAR 1998-067XS· ISS / Science· LEO

Launch

Launched on Nov 20, 1998 from 81/23 (81L), Kazakhstan aboard a Proton-K.

Proton | Zarya →

Live · TLE epoch 2026-10-24 04:50 UTC

Orbit class

LEO — Low Earth Orbit (circular, < 2,000 km)

Operator

United States Government

Country

United States

Manufacturer

—

Launched

Nov 20, 1998

Mass

—

Apogee

358 km

Perigee

351 km

Inclination

51.62°

Period

1.52 h

Altitude history

Apogee and perigee for DUPLEX across 149 days of archived orbital elements (151 element sets, one per day).

Trend

Decaying

Change

-37.9 km

Rate

-0.25 km/day

Now

351 × 358 km

Apogee Perigee

Derived from our own archive of CelesTrak orbital elements, sampled every 3 hours. Short windows show drag and station-keeping; they are not a reentry prediction.

Launched with

14 other catalogued objects still in orbit from launch 1998-067 (Proton | Zarya).

ISS (ZARYA) · 25544
HRC MONOBLOCK CAMERA · 66052
KNACKSAT-2 · 67683
GXIBA-1 · 67685
UITMSAT-2 · 67686
LEOPARD · 67687
HMU-SAT2 · 67688
HOKUSHIN-1 · 69648
HUCSAT · 69794
PROVES-ELECTRA · 69795
ISS OBJECT YM · 69796
ISS OBJECT YN · 69797
ISS OBJECT YP · 69798
ISS OBJECT YQ · 69799

Sources & further reading

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