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2018-12-05 / 4UC 600-012360 / (38) Leda

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Pascal Andre O+ VID M300 FR GPS++ 21:50:00 22:02:20.89 22:02:29.61 22:10:00 0.08 0.16 8.72 86.3
2 show Jiri Kubanek O+ VID M203 AT GPS++ 21:58:28 22:00:21.23 22:00:30.03 22:02:32 0.08 0.08 8.80 87.1
3 show Peter Delincak O+ CCD M400 SK GPS++ 21:58:00 21:59:58.48 22:00:07.36 22:02:00 0.05 0.05 8.88 87.9
4 show Petr Zeleny O+ VID M254 CZ NTP 21:58:15 22:00:03.8 22:00:11.5 22:02:15 0.6 0.6 7.70 76.2
5 show Dariusz Miller O- VIS M270 PL 22:02:17 22:10:50
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#130 : dc45feac-1ac3-4073-9415-dfa31b814e09 [db: observed]

Using prediction dc45feac-1ac3-4073-9415-dfa31b814e09 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:
Size = 95 x 83 km
a',b' = 47.3, 41.4 km
X0,Y0 = 625.3, 27.9 km
Mean diameter = 88 km

From 4 chords (VID,CCD)








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: 2018-12-05, 22:02 UT (JD = 2458458.418)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 720None12.836 161°, -15° 2.443956e614502.40.0° None2013-10-18 not scaled 2013-10-16
# 721None12.836 345°, -4° 2.443956e614502.40.0° None2013-10-18 not scaled 2013-10-16
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] : dc45feac-1ac3-4073-9415-dfa31b814e09 [observed]

 Occultation Date + Time   : 2018-12-05 at 22:01:05 UT +/- 0.01 min  [1]
 Object Designation        : (38) Leda
 Orbit Class               : MBA
 Star Designation          : GDR3 0165682800148094848
 Star Coordinates (ICRF)   : RA = 04 16 01.8757, DE = +29 57 04.793  [2]
 Star Magnitudes           : G = 11.63 mag, RP = 10.89 mag, BP = 12.21 mag
 Object Magnitude          : V = 11.49 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 11.7 sec
 Object Mean Diameter      : 116 km  (src: astorb)
 Speed of the shadow       : 9.9 km/s
 Elongation to Moon & Sun  : 164° (sunlit = 2%), Sun = 169°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.35 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#130

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

More Data and Informations
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