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2018-06-13 / 4UC 329-084180 / (940) Kordula

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Carles Schnabel O+ VID M250 ES GPS++ 02:13:08 02:15:31.87 02:15:38.59 02:19:05 1.28 0.96 6.72 88.0
2 show C. Perello/A. Selva O+ VID M500 ES GPS++ 02:14:01 02:15:31.90 02:15:37.74 02:17:01 0.08 0.16 5.84 76.5
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#62 : 996f1da6-4f8a-471f-9f57-cfc934aeee0b [db: observed]
JPL#62 : 7c174d28-7236-4f7c-b508-ea42a98d01da [db: observed]
JPL#62 : 6c98b679-04eb-4cf7-9224-dad6ada0a521 [db: observed]

Using prediction 996f1da6-4f8a-471f-9f57-cfc934aeee0b for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

 Auto-Fit Result:
X0,Y0 = 113.0, -6.1 km
Circular diameter = 112 km

From 2 chords (VID)








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2018-06-13, 02:15 UT (JD = 2458282.594)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 58641.015.564 272°, -39° 2.457324e6958.60.0° None2020-10-05 not scaled 2019-10-23
# 58651.015.564 102°, -30° 2.457324e6958.60.0° None2020-10-05 not scaled 2019-10-23
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 996f1da6-4f8a-471f-9f57-cfc934aeee0b [observed]

 Occultation Date + Time   : 2018-06-13 at 02:19:56 UT +/- 0.01 min  [1]
 Object Designation        : (940) Kordula
 Orbit Class               : MBA
 Star Designation          : GDR3 4125310113523267968
 Star Coordinates (ICRF)   : RA = 16 53 36.9677, DE = -24 15 15.170  [2]
 Star Magnitudes           : G = 13.24 mag, RP = 12.73 mag, BP = 13.57 mag
 Object Magnitude          : V = 14.1 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 6.7 sec
 Object Mean Diameter      : 87 km  (src: astorb)
 Speed of the shadow       : 13.1 km/s
 Elongation to Moon & Sun  : 173° (sunlit = 1%), Sun = 173°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.65 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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