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2024-12-31 / UCAC4 469-032124 / (2326) Tololo

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Delincak O+ VID M400 SK NTP 20:11:42 20:13:47.336 20:13:50.590 20:15:52 0.088 0.088 3.25 34.8
2 show Jiri Kubanek O+ VID M200 CZ GPS 20:12:35 20:14:04.88 20:14:06.83 20:15:35 0.20 0.20 1.95 20.9
3 show Zdenek Sikac O+ VID T150 CZ NTP 20:12:02 20:14:03.17 20:14:05.92 20:16:00 0.20 0.20 2.75 29.4
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#69 : e447ff80-8811-11ef-78cd-4dfd3d6749f9 [db: asteroids]
JPL#69 : b37814d0-8348-11ef-6618-a65fdedfa999 [db: asteroids]

Using prediction e447ff80-8811-11ef-78cd-4dfd3d6749f9 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 = 41 x 34 km
a',b' = 20.4, 16.8 km
X0,Y0 = -1150.3, 18.9 km
Mean diameter = 37 km

From 3 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.

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : e447ff80-8811-11ef-78cd-4dfd3d6749f9 [asteroids]

 Occultation Date + Time   : 2024-12-31 at 20:06:34 UT +/- 0.0 min  [1]
 Object Designation        : (2326) Tololo
 Orbit Class               : MBA
 Star Designation          : GDR3 3136394821321606656
 Star Coordinates (ICRF)   : RA = 07 33 31.6000, DE = +03 38 53.531  [2]
 Star Magnitudes           : G = 13.92 mag, RP = 13.27 mag, BP = 14.41 mag
 Object Magnitude          : V = 14.61 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 3.8 sec
 Object Mean Diameter      : 41 km  (src: astorb)
 Speed of the shadow       : 10.7 km/s
 Elongation to Moon & Sun  : 157° (sunlit = 1%), Sun = 158°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#69

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

More Data and Informations
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