Quaoar

2002 LM60TNO> Hot C.

event on 2011-05-04

569

Radius (km)

0.109

Geometric albedo

Positive chords

Brazil, Chile, Uruguay

Observed from

Size — to scalevs Pluto

QUAOAR · R 569 KMPLUTO · R 1188 KM

Quaoar — this objectPluto — comparison

Physical properties

Radius eq. (km)569 ± 24/-17

Equivalent radius (km)555 ± 2.5

Oblateness0.897 ± 0.03/-0.02

Axis ratios (b/a · c/a)—

Density (g/cm³)1.99 ± 0.46

ShapeMaclaurin

Albedo (V)0.109 ± 7

Orbit — top viewheliocentric

43.5

a (AU)

0.041

i (deg)

Occultation record

Event date2011-05-04

Observed fromBrazil, Chile, Uruguay

Positive chords5

KindMain

Delta (au)42.35

Star G mag.—

Object G mag.—

Astrometryfeeds NIMA ephemeris

Position Date (JD)2455685.61111110

RA position17 28 50.796367

Error RA·cos(δ) (mas)0.42

DEC position−15 27 42.80143

Error DEC (mas)0.36

Atmosphere

Pressure (nbar)<21

Atm. gasCH4

Reference & provenance

Lucky Star projectYes

ReferenceRommel et al, A&A, 644, A40, 2020

Comment—