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2025-04-11 / UCAC4 581-012129 / (567) Eleutheria

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Olivier Schreurs, Esteban Fernandez Pelaez O+ VID M406 BE GPS 21:09:08 21:10:05.60 21:10:07.20 21:11:07 0.2 0.2 1.60 54.1
2 show Simon Kidd O+ VID M350 GB GPS 21:09:00 21:10:02.110 21:10:03.900 21:11:00 0.19 0.3 1.79 60.5
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#68 : f693f940-85f1-11ef-78cd-c90cfbfb59c5 [db: asteroids]

Using prediction f693f940-85f1-11ef-78cd-c90cfbfb59c5 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 = 622.2, 24.3 km
Circular diameter = 85 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: 2025-04-11, 21:10 UT (JD = 2460777.382)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1171None7.717 317°, 33° 2.450821e69956.40.0° NoneNone not scaled 2016-01-04
# 1172None7.717 131°, 53° 2.450821e69956.40.0° NoneNone not scaled 2016-01-04
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] : f693f940-85f1-11ef-78cd-c90cfbfb59c5 [asteroids]

 Occultation Date + Time   : 2025-04-11 at 21:07:46 UT +/- 0.0 min  [1]
 Object Designation        : (567) Eleutheria
 Orbit Class               : MBA
 Star Designation          : GDR3 0148296841250523520
 Star Coordinates (ICRF)   : RA = 04 42 53.0849, DE = +26 06 24.763  [2]
 Star Magnitudes           : G = 14.95 mag, RP = 14.14 mag, BP = 15.62 mag
 Object Magnitude          : V = 15.34 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 2.8 sec
 Object Mean Diameter      : 93.4 km  (src: astorb)
 Speed of the shadow       : 33.8 km/s
 Elongation to Moon & Sun  : 117° (sunlit = 99%), Sun = 51°
 Cross-track uncertainty   : 0.8 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#68

 
 [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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