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2024-10-12 / UCAC4 357-162782 / (924) Toni

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show David Lafuente Aznar, Silvia Calavia O+ CCD M200 ES GPS 20:00:16 20:01:18.664 20:01:22.228 20:02:35 0.267 0.267 3.56 76.5
2 show Jorge JUAN O+ VID M410 ES GPS 19:58:21 20:01:27.3 20:01:30.1 20:04:07 0.6 1.0 2.80 60.2
3 show Antoni Selva, Carlos Perello O+ VID M500 ES GPS 20:00:51 20:01:27.750 20:01:31.440 20:02:51 0.06 0.06 3.69 79.3
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#68 : 881e1a60-c357-11ef-5276-5528df9f02a7 [db: observed]
JPL#66 : b1555cd0-8672-11ef-78cd-3c9bfe7f4d13 [db: asteroids]
JPL#66 : 70440bc0-82d4-11ef-6618-5cb9f1dff4aa [db: asteroids]

Using prediction 70440bc0-82d4-11ef-6618-5cb9f1dff4aa 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 78 km

From 3 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: 2024-10-12, 20:00 UT (JD = 2460596.333)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 58471.019.437 40°, 32° 2.457249e63347.30.0° None2020-10-05 not scaled 2019-10-23
# 58481.019.438 214°, 37° 2.457249e63347.30.0° None2020-10-05 not scaled 2019-10-23
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] : 70440bc0-82d4-11ef-6618-5cb9f1dff4aa [asteroids]

 Occultation Date + Time   : 2024-10-12 at 19:59:27 UT +/- 0.0 min  [1]
 Object Designation        : (924) Toni
 Orbit Class               : MBA
 Star Designation          : GDR3 4098417433530263552
 Star Coordinates (ICRF)   : RA = 18 47 57.7913, DE = -18 44 13.440  [2]
 Star Magnitudes           : G = 13.68 mag, RP = 12.69 mag, BP = 14.7 mag
 Object Magnitude          : V = 14.98 mag
 Estimated Magnitude Drop  : 1.6 mag
 Estimated Max. Duration   : 4.0 sec
 Object Mean Diameter      : 86 km  (src: astorb)
 Speed of the shadow       : 21.5 km/s
 Elongation to Moon & Sun  : 35° (sunlit = 72%), Sun = 81°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#66

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

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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