16182 · SL-8 R/B
rocket body — Kosmos-3M upper stage, 1985
Orbit
Apogee1012km
Perigee967km
Inclination82.9°
RCS4.710m²
Characterization
- Object type
- rocket body
- Origin
- Kosmos-3M upper stage, 1985
- Radar cross-section
- 4.710 m²
- Active conjunctions
- 1
Derived elements
two-body · vis-viva
Semi-major axis7367.6km
Eccentricity0.00305
Period104.89min
Mean motion13.7281rev/day
Velocity at perigee7.378km/s
Velocity at apogee7.333km/s
LEO · computed from the catalogued apsides with μ = 398600.4418 km³/s² and R⊕ = 6378.137 km (WGS-84).
Secular perturbations
J2 oblateness
Nodal regression-0.7434deg/day
Apsidal rotation-2.7777deg/day
Ω̇ node · ω̇ argument of perigee, secular rates from the J2 term.
J2 is the dominant perturbation at this altitude. The plane precesses relative to the fleet's, so the encounter geometry walks through the catalogue rather than repeating.
Orbit determination
special perturbations
PropagatorSP
Epoch age0.2h
Observation arc11.6d
Inferred mass20761.51kg
Ballistic coeff.2003.6kg/m²
- Covariance delivered
- full 6x6
Special-perturbations fit — numerically integrated against a full force model, delivered with a covariance the screening pipeline can use directly.
Conjunctions against the fleet
1 active
| Event | Primary | TCA | Miss km | Rel vel km/s | Pc |
|---|---|---|---|---|---|
| CJ-4465 | OG-5Halcyon | T−33:01:48 | 1.240 | 9.16 | 6.8×10−5 |
Spacecraft: OG-5