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2024-09-17 / UCAC4 556-029809 / (420) Bertholda

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Carles Schnabel O+ VID M400 ES GPS 04:50:34 04:52:46.9 04:52:50.1 04:53:12 0.6 1.3 3.20 70.4
2 show Oscar Canales O+ CCD M280 ES GPS 04:50:38 04:52:37.59 04:52:39.74 04:54:38 0.27 0.27 2.15 47.3
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#137 : 84b67ad0-c356-11ef-5276-958dbcf13d90 [db: observed]
JPL#135 : a75ecd70-85a9-11ef-78cd-e1207fd8f464 [db: asteroids]

Using prediction a75ecd70-85a9-11ef-78cd-e1207fd8f464 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 = -398.9, 53.3 km
Circular diameter = 75 km

From 2 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).

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : a75ecd70-85a9-11ef-78cd-e1207fd8f464 [asteroids]

 Occultation Date + Time   : 2024-09-17 at 04:54:44 UT +/- 0.01 min  [1]
 Object Designation        : (420) Bertholda
 Orbit Class               : MBA
 Star Designation          : GDR3 3373037486288078208
 Star Coordinates (ICRF)   : RA = 06 31 43.3751, DE = +21 11 37.598  [2]
 Star Magnitudes           : G = 14.94 mag, RP = 14.11 mag, BP = 15.65 mag
 Object Magnitude          : V = 14.55 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 6.4 sec
 Object Mean Diameter      : 141 km  (src: astorb)
 Speed of the shadow       : 22.0 km/s
 Elongation to Moon & Sun  : 115° (sunlit = 99%), Sun = 77°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#135

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

More Data and Informations
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