Occultation by 2010EK139 (2018-02-20)


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Occultation circumstances

Date Tue. 20 Feb. 2018 04:50:52
Star position (ICRF) 14 02 48.0388 -39 13 04.905
C/A 0.178 arcsec
P/A 306.90 °
velocity -14.17 km/s
Geocentric distance Δ 36.1014 au
G mag* 14.4
J mag* 12.9
Magnitude drop 5.0
Uncertainty in time 124.1 sec
Uncertainty in C/A 131.9 mas
Uncertainty in projected distance 3452.3 km
Probability of occultation on centrality 5.4%
Maximum duration 33.2 sec
Moon distance to the object 143.9°
Fraction of illuminated Moon 18.4 %
Solar elongation 106.4°

Occulted star

Star source ID 6111344699606921216
Stellar catalogue GAIADR1
Star astrometric position in catalogue (ICRF) 14 02 48.0595 -39 13 04.834
Star astrometric position with proper motion (ICRF) 14 02 48.0388 -39 13 04.905
Star apparent position (date) 14 03 54.1943 -39 18 04.636
Proper motion μRA* = (-76.6 ± 2.0)mas; μDEC = (-22.5 ± 2.0) mas
Source of proper motion UCAC5
Uncertainty in the star position RA* = 6.3 mas; DEC= 6.3 mas
G magnitude 14.8
J magnitude (2MASS) 13.2

Objet

Object (471143) 2010EK139
Diameter 470.0 km
Apparent diameter 18.0 mas
Object astrometric position (ICRF) 14 02 48.0266 -39 13 04.798
Object apparent position (date) 14 03 54.1820 -39 18 04.529
Uncertainty in position RA* = 124.1mas DEC = 80.2mas
Apparent magnitude 19.7
Ephemeris NIMAv3
Dynamic class(1) res 2:7
Semi major axis(1) 70.5 au
Eccentricity(1) 0.538
Inclination(1) 29.4°
Perihelion(1) 32.6 au
Aphelion(1) 108.4 au
(1) Data from the johnston archive list.

Sky map (Aladin)

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