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2025-04-01 / UCAC4 615-035401 / (3230) Vampilov

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Stefan Meister O+ VID M500 CH GPS 21:42:41 21:42:55.788 21:42:57.557 21:43:10 0.025 0.025 1.77 25.7
2 show Roland BONINSEGNA, ASSOIGNON Pascale O+ VID M400 BE GPS 21:41:33 21:42:33.14 21:42:34.74 21:43:31 0.08 0.08 1.60 23.2
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#57 : 1e1d5270-8928-11ef-78cd-5205f1f720f4 [db: asteroids]

Using prediction 1e1d5270-8928-11ef-78cd-5205f1f720f4 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 = -738.8, 33.6 km
Circular diameter = 39 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).

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 1e1d5270-8928-11ef-78cd-5205f1f720f4 [asteroids]

 Occultation Date + Time   : 2025-04-01 at 21:39:11 UT +/- 0.0 min  [1]
 Object Designation        : (3230) Vampilov
 Orbit Class               : MBA
 Star Designation          : GDR3 0941255521874367360
 Star Coordinates (ICRF)   : RA = 06 34 19.5558, DE = +32 59 51.631  [2]
 Star Magnitudes           : G = 14.29 mag, RP = 13.55 mag, BP = 14.88 mag
 Object Magnitude          : V = 18.87 mag
 Estimated Magnitude Drop  : 4.6 mag
 Estimated Max. Duration   : 1.6 sec
 Object Mean Diameter      : 23.4 km  (src: astorb)
 Speed of the shadow       : 14.5 km/s
 Elongation to Moon & Sun  : 37° (sunlit = 17%), Sun = 85°
 Cross-track uncertainty   : 0.4 mas = 1 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.04 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#57

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

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