Chiron

1977 UBCentaurDust/Jet

event on 1993-11-07

89.6

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 89.6 KMPLUTO · R 1188 KM

Chiron — this objectPluto — comparison

Physical properties

Radius eq. (km)89.6 ± 6.8

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 date1993-11-07

Observed fromUnited States of America

Positive chords4

KindMain

Delta (au)9.3

Star G mag.—

Object G mag.20.82

Astrometryfeeds NIMA ephemeris

Position Date (JD)2449299.05208330

RA position10 28 08.00772

Error RA·cos(δ) (mas)2.4

DEC position03 30 36.3356

Error DEC (mas)2.2

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)—

Atm. gas—

Reference & provenance

Lucky Star projectYes

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

DOI10.1051/0004-6361/202039054

Linkhttps://doi.org/10.1006/icar.1996.0173

CommentDave Herald and Willian Hanna reports. The two chors were too close to derive the size of the object.