Chiron

1977 UBCentaurDust/Jet

event on 2011-11-29

Radius (km)

—

Geometric albedo

Positive chords

United States of America

Observed from

3D modelChiron · interactive

Downloads 4.4 MB

Model of the occulting body, not a product of this event — a reconstruction, not a direct measurement. The values below are what this occultation measured.

Size — to scalevs Pluto

CHIRON · R 86 KMPLUTO · R 1188 KM

Chiron — this objectPluto — comparison

Physical properties

Radius eq. (km)86

Equivalent radius (km)96.7

Oblateness—

Axis ratios (b/a · c/a)—

Density (g/cm³)—

ShapeTri-axial

Albedo (V)—

Orbit — top viewheliocentric

13.64

a (AU)

0.38

6.93

i (deg)

Occultation record

Event date2011-11-29

Observed fromUnited States of America

Positive chords2

KindMain

Delta (au)17.04

Star G mag.—

Object G mag.—

Astrometryfeeds NIMA ephemeris

Position Date (JD)2455894.84444440

RA position22 02 44.331192

Error RA·cos(δ) (mas)0.23

DEC position−05 55 12.0556

Error DEC (mas)1.4

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

Linkhttps://doi.org/10.1016/j.icarus.2015.01.015

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.