Occultation by Pluto (2018-08-15)


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Occultation circumstances

Date Wed. 15 Aug. 2018 05:32:52
Star position (ICRF) 19 22 10.4687 -21 58 49.020
C/A 0.184 arcsec
P/A 347.11 °
velocity -19.33 km/s
Geocentric distance Δ 32.7670 au
G mag* 13.0
RP mag* 12.5
Magnitude drop 1.8
Uncertainty in time 8.4 sec
Uncertainty in C/A 5.5 mas
Uncertainty in projected distance 130.7 km
Probability of occultation on centrality 100.0%
Maximum duration 126.2 sec
Moon distance to the object 94.7°
Fraction of illuminated Moon 19.5 %
Solar elongation 146.6°

Occulted star

Star source ID 6772629170525258240
Stellar catalogue GAIADR2
Star astrometric position in catalogue (ICRF) 19 22 10.4673 -21 58 49.049
Star astrometric position with proper motion (ICRF) 19 22 10.4687 -21 58 49.020
Star apparent position (date) 19 23 17.3224 -21 56 32.014
Proper motion μRA* = (6.2 ± 0.1)mas; μDEC = (9.2 ± 0.1) mas
Source of proper motion GAIADR2
Uncertainty in the star position RA* = 0.2 mas; DEC= 0.2 mas
G magnitude 13.0
RP magnitude (GaiaDR2) 12.5

Objet

Object (S999) Pluto
Diameter 2440.0 km
Apparent diameter 102.7 mas
Object astrometric position (ICRF) 19 22 10.4658 -21 58 48.841
Object apparent position (date) 19 23 17.3195 -21 56 31.834
Uncertainty in position RA* = 7.3mas DEC = 4.9mas
Apparent magnitude 14.6
Ephemeris NIMAv5PLU055
Dynamic class(1) plutino
Semi major axis(1) 39.7 au
Eccentricity(1) 0.253
Inclination(1) 17.1°
Perihelion(1) 29.7 au
Aphelion(1) 49.8 au
(1) Data from the johnston archive list.

Sky map (Aladin)

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