Occultation event
Haumea
event on 2017-01-21
816
Radius (km)
0.51
Geometric albedo
10
Positive chords
Czechia, Germany, Hungary, Italy, Slovakia, Slovenia
Observed from
Size — to scalevs Pluto
HAUMEA · R 816 KMPLUTO · R 1188 KM
Haumea — this objectPluto — comparison
Physical properties
Radius eq. (km)816 ± 15
Equivalent radius (km)798 ± 6
Oblateness435 ± 38
Axis ratios (b/a · c/a)—
Density (g/cm³)1.885 ± 0.08
ShapeJacobi
Albedo (V)0.51 ± 0.02
Orbit — top viewheliocentric
43.35
a (AU)
0.19
e
28.21
i (deg)
Occultation record
Event date2017-01-21
Observed fromCzechia, Germany, Hungary, Italy, Slovakia, Slovenia
Positive chords10
KindMain
Delta (au)50.59
Star G mag.—
Object G mag.17.826
Astrometryfeeds NIMA ephemeris
Position Date (JD)2457774.631250
RA position14 12 03.199770
Error RA·cos(δ) (mas)0.68
DEC position16 33 58.73306
Error DEC (mas)0.57
Atmosphere
Pressure (nbar)<50
Atm. gasN2, CH4
Reference & provenance
Lucky Star projectYes
ReferenceRommel et al, A&A, 644, A40, 2020
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.