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2024-09-16 / UCAC4 530-006185 / (959) Arne

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Carles Schnabel O+ VID M400 ES GPS 00:24:40 00:27:01.6 00:27:14.3 00:29:18 0.3 0.3 12.70 53.3
2 show Jorge JUAN O+ VID M410 ES GPS 00:24:17 00:27:03.0 00:27:13.8 00:30:02 0.6 0.6 10.80 45.4
3 show Antoni Selva O+ VID M500 ES GPS 00:25:10 00:27:05.400 00:27:17.500 00:29:11 0.4 0.3 12.10 50.8
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#73 : a16286c0-c355-11ef-5276-23d2d5ed940d [db: observed]

Using prediction a16286c0-c355-11ef-5276-23d2d5ed940d 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 = 52 x 27 km
a',b' = 26.2, 13.7 km
X0,Y0 = 1635.4, 16.8 km
Mean diameter = 38 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] : a16286c0-c355-11ef-5276-23d2d5ed940d [observed]

 Occultation Date + Time   : 2024-09-16 at 00:35:06 UT +/- 0.01 min  [1]
 Object Designation        : (959) Arne
 Orbit Class               : MBA
 Star Designation          : GDR3 0054294880612513536
 Star Coordinates (ICRF)   : RA = 03 25 13.0267, DE = +15 53 23.903  [2]
 Star Magnitudes           : G = 15.59 mag, RP = 14.93 mag, BP = 16.06 mag
 Object Magnitude          : V = 15.04 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 13.5 sec
 Object Mean Diameter      : 57 km  (src: astorb)
 Speed of the shadow       : 4.2 km/s
 Elongation to Moon & Sun  : 88° (sunlit = 94%), Sun = 121°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.73 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#73

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

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