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Occultation event

2002 MS4

2002 MS4TNO> Hot C.Other
event on 2020-08-08
400
Radius (km)
Geometric albedo
61
Positive chords
Observed from
Size — to scalevs Pluto
2002 MS4 · R 400 KMPLUTO · R 1188 KM
2002 MS4 — this objectPluto — comparison
Physical properties
Radius eq. (km)
Equivalent radius (km)400 ± 3
Oblateness
Axis ratios (b/a · c/a)
Density (g/cm³)
ShapeMaclaurin
Albedo (V)
Orbit — top viewheliocentric
Neptune 30 AU
41.9
a (AU)
0.144
e
17.7
i (deg)
Occultation record
each line — one station saw the star vanish
Event date2020-08-08
Observed from
Positive chords61
KindMain
Delta (au)45.6939
Star G mag.14.6
Object G mag.20.5
Astrometryfeeds NIMA ephemeris
Position Date (JD)
RA position
Error RA·cos(δ) (mas)
DEC position
Error DEC (mas)
Atmosphere
Pressure (nbar)
Atm. gas
Reference & provenance
Lucky Star projectYes
Referencepreliminary
DOI
Comment
2002 MS4 occultation — 2020-08-08 · SOSB / Lucky Star