Occultation event

Orus

1999 VQ10Trojan

event on 2019-09-07

27.8

Radius (km)

0.06

Geometric albedo

Positive chords

Oman

Observed from

Size — to scalevs Pluto

ORUS · R 27.8 KMPLUTO · R 1188 KM

Orus — this objectPluto — comparison

Physical properties

Radius eq. (km)> 27.8

Equivalent radius (km)24.4

Oblateness0.2299

Axis ratios (b/a · c/a)0.77 · —

Density (g/cm³)—

ShapeUndetermined

Albedo (V)0.06

Orbit — top viewheliocentric

5.12

a (AU)

0.036

8.47

i (deg)

Occultation record

Event date2019-09-07

Observed fromOman

Positive chords1 // radius lower limit

KindMain

Delta (au)4.276

Star G mag.11.671

Object G mag.17.235

Astrometryfeeds NIMA ephemeris

Position Date (JD)2458734.4088044

RA position21 15 24.76841

Error RA·cos(δ) (mas)—

DEC position−06 04 11.4457

Error DEC (mas)—

Atmosphere

Pressure (nbar)—

Atm. gas—

Reference & provenance

Lucky Star projectNo

ReferenceMarc W. Buie et al, Planet.Sci.J, 2, 202, 2021

DOI10.3847/PSJ/ac1f9b

Link—

CommenteVscope report. See also http://lucy.swri.edu//occ/20190907Orus.html and http://lesia.obspm.fr/lucky-star/occ.php?p=8940