Umbriel (Uranus/2)

Uranus/2Planet Satellite

event on 2025-08-02

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Radius (km)

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Geometric albedo

Positive chords

United States of America

Observed from

Size — to scalevs Pluto

UMBRIEL (URANUS/2) · R — KMPLUTO · R 1188 KM

Umbriel (Uranus/2) — this objectPluto — comparison

Physical properties

Radius eq. (km)—

Equivalent radius (km)—

Oblateness—

Axis ratios (b/a · c/a)—

Density (g/cm³)—

ShapeUndetermined

Albedo (V)—

Orbit — top viewheliocentric

19.191

a (AU)

0.0472

0.7699

i (deg)

Occultation record

Event date2025-08-02

Observed fromUnited States of America

Positive chords2

KindMain

Delta (au)19.852

Star G mag.13.18

Object G mag.15

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—

Linkhttps://cloud.occultwatcher.net/event/1674-P7M02-55478-649266-U007948

Comment—