Occultation event

Pluto

1930 BMTNO> PlutinoAtmosphere

event on 2015-06-29

1189

Radius (km)

0.57

Geometric albedo

Positive chords

Australia, New Zealand

Observed from

Size — to scalevs Charon

PLUTO · R 1189 KMCHARON · R 606 KM

Pluto — this objectCharon — comparison

Physical properties

Radius eq. (km)1189 ± 1.6

Equivalent radius (km)1189.1 ± 2.3

Oblateness4 ± <

Axis ratios (b/a · c/a)—

Density (g/cm³)1.854 ± 0.011

ShapeSpherical

Albedo (V)0.57 ± 0.09

Orbit — top viewheliocentric

39.846

a (AU)

0.2537

17.103

i (deg)

Occultation record

Event date2015-06-29

Observed fromAustralia, New Zealand

Positive chords8

KindMain

Delta (au)31.89

Star G mag.12.1

Object G mag.—

Astrometryfeeds NIMA ephemeris

Position Date (JD)2457203.204645830

RA position19 00 49.47778

Error RA·cos(δ) (mas)0.1

DEC position-20 41 40.9707

Error DEC (mas)0.1

Atmosphere

Pressure (nbar)12710

Atm. gasN2

Reference & provenance

Lucky Star projectYes

ReferenceSicardy et al., ApJ, 2016

DOI10.3847/2041-8205/819/2/L38

Linkhttps://doi.org/10.3847/2041-8205/819/2/L38

CommentCentral flash detected; See also Pasachoff et al., Icar, 2017(https://doi.org/10.1016/j.icarus.2017.05.012), Meza et al. & Desmars et al. A&A, 2019