Occultation by 2002WC19 (2018-12-30)
This occultation has a more recent update available here
Occultation map
Information about the map:
- The straight and continue lines are the shadow limits considering the estimated radius; when the shadow crosses the Earth's surface, the path is projected on the Earth;
- Each blue dot is spaced by one minute and the big blue dot corresponds to the nominal occultation time (which is the geocentric closest approach);
- The arrow shows the direction of the shadow motion;
- The 1-σ precision along the path is represented by the red dotted line;
- The star G* and J* are the G (from Gaia) and J (from 2MASS) magnitudes, normalized to a body moving at 20km/s in order to enhance very slow events;
- The body offset is at the upper right corner, if JPL ephemeris is used;
- Areas in dark grey correspond to full night (Sun elevation below -18 degrees) and areas in light grey correspond to twilight (Sun elevation between -18 and 0 degrees) while daytime is in white;
- Be careful, the dates are from the moment of the event in Universal Time, the night of the event may begin at the date before.
Occultation circumstances
| Date | Sun. 30 Dec. 2018 11:56:09 |
| Star position (ICRF) | 05 50 53.8934 +19 55 52.780 |
| C/A | 0.180 arcsec |
| P/A | 181.67 ° |
| velocity | -24.93 km/s |
| Geocentric distance Δ | 39.3662 au |
| G mag* | 16.6 |
| J mag* | 14.9 |
| Magnitude drop | 4.6 |
| Uncertainty in time | 146.9 sec |
| Uncertainty in C/A | 65.4 mas |
| Uncertainty in projected distance | 1867.1 km |
| Probability of occultation on centrality | 7.7% |
| Maximum duration | 14.6 sec |
| Moon distance to the object | 114.6° |
| Fraction of illuminated Moon | 38.2 % |
| Solar elongation | 168.9° |
Occulted star
| Star source ID | 3398942182097547520 |
| Stellar catalogue | GAIADR1 |
| Star astrometric position in catalogue (ICRF) | 05 50 53.8940 +19 55 52.812 |
| Star astrometric position with proper motion (ICRF) | 05 50 53.8934 +19 55 52.780 |
| Star apparent position (date) | 05 52 01.8915 +19 56 02.106 |
| Proper motion | μRA* = (-1.9 ± 1.7)mas; μDEC = (-8.0 ± 1.5) mas |
| Source of proper motion | GPS1 |
| Uncertainty in the star position | RA* = 6.7 mas; DEC= 5.9 mas |
| G magnitude | 16.3 |
| J magnitude (2MASS) | 14.6 |
Objet
| Object | (119979) 2002WC19 |
| Diameter | 363.0 km |
| Apparent diameter | 12.7 mas |
| Object astrometric position (ICRF) | 05 50 53.8931 +19 55 52.601 |
| Object apparent position (date) | 05 52 01.8911 +19 56 01.927 |
| Uncertainty in position | RA* = 128.6mas DEC = 64.4mas |
| Apparent magnitude | 20.9 |
| Ephemeris | NIMAv4 |
| Dynamic class(1) | res 1:2 |
| Semi major axis(1) | 47.7 au |
| Eccentricity(1) | 0.262 |
| Inclination(1) | 9.2° |
| Perihelion(1) | 35.2 au |
| Aphelion(1) | 60.3 au |
(1) Data from the johnston archive list.