Occultation event

Eris

2003 UB313TNO> Scattered D.O.

event on 2013-08-29

498

Radius (km)

0.96

Geometric albedo

Positive chords

Australia

Observed from

Size — to scalevs Pluto

ERIS · R 498 KMPLUTO · R 1188 KM

Eris — this objectPluto — comparison

Physical properties

Radius eq. (km)> 498

Equivalent radius (km)1163 ± 6

Oblateness0

Axis ratios (b/a · c/a)—

Density (g/cm³)2.52 ± 0.05

ShapeSpherical

Albedo (V)0.96 ± 0.09/-0.04

Orbit — top viewheliocentric

67.867

a (AU)

0.436

44.04

i (deg)

Occultation record

Event date2013-08-29

Observed fromAustralia

Positive chords1 // radius lower limit

KindMain

Delta (au)95.77

Star G mag.18.1395

Object G mag.20.637

Astrometryfeeds NIMA ephemeris

Position Date (JD)2456534.15138890

RA position01 42 58.50247

Error RA·cos(δ) (mas)1.2

DEC position−03 21 17.39482

Error DEC (mas)0.85

Where on the skyThe published position of this event, against the constellations.

Chart data: d3-celestial (BSD-3-Clause), from Hipparcos / Yale BSC and the IAU figures. Position J2000.

Atmosphere

Pressure (nbar)no

Atm. gas—

Reference & provenance

Lucky Star projectYes

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

DOI10.1051/0004-6361/202039054

Link—

CommentThis object has an ambiguous solution where the center of it could be north or south of the observed chord. In this case we assumed the north position.