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2025-09-25 / UCAC4 446-128672 / (712) Boliviana

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Ferran Casarramona O+ VID M200 ES GPS 22:17:01 22:18:05.200 22:18:21.116 22:20:01 0.012 0.012 15.92 92.3
2 show Deborah Smith O+ VID M300 ES GPS 22:16:07 22:17:59.387 22:18:19.099 22:20:07 0.015 0.015 19.71 114.3
3 show Deborah Smith O+ VID M200 ES GPS 22:15:59 22:17:57.810 22:18:03.814 22:19:59 0.009 0.009 6.00 34.8
4 show Jose Antonio de los Reyes, Sensi Pastor O+ VID M300 ES GPS 22:15:56 22:17:47.18 22:18:00.64 22:19:55 0.040 0.040 13.46 78.1
5 show Oscar Canales O+ CCD M200 ES GPS 22:15:01 22:16:52.61 22:17:09.34 22:19:00 0.050 0.050 16.73 97.0
6 show Javier Prat, Pedro Martorell O+ CCD M310 ES GPS 22:14:14 22:16:40.02 22:16:44.31 22:19:14 0.030 0.030 4.29 24.9
7 show Eric Barbotin O+ VID T508 FR GPS 22:14:01 22:15:55.59 22:16:15.86 22:17:01 0.100 0.100 20.27 117.6
8 show Gonzalo Arraras O- CCD M200 ES GPS 22:14:39 :: :: 22:18:40
9 show Michel Boutet O- VID M300 FR GPS 23:13:39 :: :: 22:16:48
10 show Nigel Wakefield O- VID M250 GB GPS 22:13:42 :: :: 22:15:40
11 show Malcolm Jennings O- VID M276 GB GPS 22:11:00 :: :: 22:17:00
12 show Tim Haymes O- VID M280 GB GPS 22:12:00 :: :: 22:17:00
13 show Simon Kidd O- VID M350 GB GPS 22:12:31 :: :: 22:16:46
14 show William Stewart O- VID M279 GB GPS 22:13:09 :: :: 22:15:17
15 show Alex Pratt O- VID M280 GB GPS 22:12:00 :: :: 22:16:05
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

15 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#152 : b3895040-8624-11ef-78cd-3da85fff11f7 [db: asteroids]

Using prediction b3895040-8624-11ef-78cd-3da85fff11f7 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 = 135 x 96 km
a',b' = 67.6, 48.1 km
X0,Y0 = -3459.9, -99.9 km
Mean diameter = 114 km

From 7 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.

Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : b3895040-8624-11ef-78cd-3da85fff11f7 [asteroids]

 Occultation Date + Time   : 2025-09-25 at 22:26:51 UT +/- 0.05 min  [1]
 Object Designation        : (712) Boliviana
 Orbit Class               : MBA
 Star Designation          : GDR3 4229274637337408256
 Star Coordinates (ICRF)   : RA = 20 23 36.3294, DE = -00 57 41.475  [2]
 Star Magnitudes           : G = 11.0 mag, RP = 9.88 mag, BP = 12.28 mag
 Object Magnitude          : V = 12.94 mag
 Estimated Magnitude Drop  : 2.1 mag
 Estimated Max. Duration   : 22.0 sec
 Object Mean Diameter      : 127.6 km  (src: astorb)
 Speed of the shadow       : 5.8 km/s
 Elongation to Moon & Sun  : 81° (sunlit = 15%), Sun = 123°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#152

 
 [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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