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2024-12-27 / UCAC4 500-001601 / (2483) Guinevere

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Gerard VAUDESCAL O+ VID T250 FR GPS 18:49:20 18:50:18.6 18:50:21.3 18:51:24 0.5 0.5 2.70 29.7
2 show Michel Boutet O+ VID M300 FR GPS 18:47:38 18:50:27.94 18:50:30.18 18:52:04 0.16 0.16 2.24 24.6
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#51 : ae41e810-882f-11ef-78cd-1490f5f4d0f1 [db: asteroids]
JPL#51 : 41fde550-8352-11ef-6618-9064fff571e2 [db: asteroids]

Using prediction ae41e810-882f-11ef-78cd-1490f5f4d0f1 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 = 558.1, 18.6 km
Circular diameter = 33 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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2024-12-27, 18:49 UT (JD = 2460672.284)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1498None14.731 194°, 59° 2.449214e611458.30.0° NoneNone not scaled 2016-01-12
# 1499None14.731 19°, 70° 2.449214e611458.30.0° NoneNone not scaled 2016-01-12
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] : ae41e810-882f-11ef-78cd-1490f5f4d0f1 [asteroids]

 Occultation Date + Time   : 2024-12-27 at 18:49:01 UT +/- 0.01 min  [1]
 Object Designation        : (2483) Guinevere
 Orbit Class               : MBA
 Star Designation          : GDR3 2581559641666890112
 Star Coordinates (ICRF)   : RA = 01 02 57.0271, DE = +09 53 51.747  [2]
 Star Magnitudes           : G = 13.28 mag, RP = 12.53 mag, BP = 13.89 mag
 Object Magnitude          : V = 16.45 mag
 Estimated Magnitude Drop  : 3.2 mag
 Estimated Max. Duration   : 4.0 sec
 Object Mean Diameter      : 44 km  (src: astorb)
 Speed of the shadow       : 11.0 km/s
 Elongation to Moon & Sun  : 139° (sunlit = 10%), Sun = 102°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#51

 
 [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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