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2025-04-04 / UCAC4 531-050651 / (144) Vibilia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Leszek Benedyktowicz O+ VID M200 PL GPS 23:14:23 23:15:56.700 23:16:06.100 23:17:32 0.20 0.20 9.40 77.1
2 show Marcin Filipek O+ VID M250 PL GPS 23:15:30 23:15:56.89 23:16:07.99 23:16:31 0.05 0.05 11.10 91.0
3 show Anna Marciniak O+ CCD M400 PL GPS 23:14:29 23:16:29.230 23:16:38.680 23:17:49 0.16 0.16 9.45 77.5
4 show Anna Marciniak O+ CCD M350 PL GPS 23:14:39 23:16:39.500 23:16:46.300 23:19:03 0.50 0.50 6.80 55.8
5 show Nikolai Wuensche O+ VID M300 DE GPS 23:15:00 23:16:50.294 23:17:05.603 23:19:00 0.137 0.137 15.31 125.5
6 show Eberhard Bredner O+ VID M250 DE GPS 23:17:04 23:17:23.2 23:17:38.6 23:19:00 0.6 0.6 15.40 126.3
7 show Marek Zawilski O- VID M200 PL GPS 23:14:05 23:18:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

7 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#129 : 448a44b0-8543-11ef-78cd-6394ef3feb44 [db: asteroids]

Using prediction 448a44b0-8543-11ef-78cd-6394ef3feb44 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 = 147 x 125 km
a',b' = 73.5, 62.3 km
X0,Y0 = -34.9, 13.0 km
Mean diameter = 135 km

From 6 chords (CCD,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: 2025-04-04, 23:15 UT (JD = 2460770.469)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1099None13.825 248°, 56° 2.44459e616180.50.0° NoneNone not scaled 2016-01-04
# 18244.013.825 251°, 63° 2.44459e616180.50.0° None2017-06-19 143.0 +/- 3.0 km 2017-06-16
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] : 448a44b0-8543-11ef-78cd-6394ef3feb44 [asteroids]

 Occultation Date + Time   : 2025-04-04 at 23:21:48 UT +/- 0.01 min  [1]
 Object Designation        : (144) Vibilia
 Orbit Class               : MBA
 Star Designation          : GDR3 3889116908281196032
 Star Coordinates (ICRF)   : RA = 10 33 46.0912, DE = +16 02 11.184  [2]
 Star Magnitudes           : G = 13.43 mag, RP = 12.23 mag, BP = 14.96 mag
 Object Magnitude          : V = 13.21 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 17.4 sec
 Object Mean Diameter      : 141.8 km  (src: astorb)
 Speed of the shadow       : 8.2 km/s
 Elongation to Moon & Sun  : 50° (sunlit = 49%), Sun = 138°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#129

 Object is a Gaia mass determination target !
[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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Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)