Occultation by Salacia (2018-12-27)


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Occultation circumstances

Date Thu. 27 Dec. 2018 03:51:44
Star position (ICRF) 23 24 24.9286 +22 06 09.494
C/A 0.245 arcsec
P/A 36.20 °
velocity 13.50 km/s
Geocentric distance Δ 44.8795 au
G mag* 15.6
RP mag* 15.1
Magnitude drop 4.7
Uncertainty in time 273.7 sec
Uncertainty in C/A 128.0 mas
Uncertainty in projected distance 4168.0 km
Probability of occultation on centrality 8.6%
Maximum duration 66.7 sec
Moon distance to the object 143.4°
Fraction of illuminated Moon 74.5 %
Solar elongation 86.4°

Occulted star

Star source ID 2838031552164423424
Stellar catalogue GAIADR2
Star astrometric position in catalogue (ICRF) 23 24 24.9293 +22 06 09.508
Star astrometric position with proper motion (ICRF) 23 24 24.9286 +22 06 09.494
Star apparent position (date) 23 25 20.6217 +22 12 27.302
Proper motion μRA* = (-2.8 ± 0.1)mas; μDEC = (-4.1 ± 0.1) mas
Source of proper motion GAIADR2
Uncertainty in the star position RA* = 0.3 mas; DEC= 0.2 mas
G magnitude 16.1
RP magnitude (GaiaDR2) 15.5

Objet

Object (120347) Salacia
Diameter 901.0 km
Apparent diameter 27.7 mas
Object astrometric position (ICRF) 23 24 24.9390 +22 06 09.691
Object apparent position (date) 23 25 20.6321 +22 12 27.500
Uncertainty in position RA* = 133.8mas DEC = 106.7mas
Apparent magnitude 20.8
Ephemeris NIMAv3
Dynamic class(1) cubewano?
Semi major axis(1) 41.9 au
Eccentricity(1) 0.11
Inclination(1) 23.9°
Perihelion(1) 37.3 au
Aphelion(1) 46.5 au
(1) Data from the johnston archive list.

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