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Occultation event

2002 MS4

2002 MS4TNO> Hot C.
event on 2021-10-14
Radius (km)
Geometric albedo
2
Positive chords
Canada, United States of America
Observed from
Size — to scalevs Pluto
2002 MS4 · R KMPLUTO · R 1188 KM
2002 MS4 — this objectPluto — comparison
Physical properties
Radius eq. (km)
Equivalent radius (km)
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 date2021-10-14
Observed fromCanada, United States of America
Positive chords2
KindMain
Delta (au)46.52
Star G mag.16.3
Object G mag.20.4
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 — 2021-10-14 · SOSB / Lucky Star