2025-10-01 / UCAC4 422-137807 / (54883) 2001 OS57
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Anna Marciniak
O+
CCD
M350
PL
NTP
21:16:30
21:17:01.24
21:17:01.75
21:17:34
0.050
0.080
0.51
5.6
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
More 1 observation found in db: sodis
Available (probably) matching predictions (click on the link to switch):
Using prediction 9b64f090-ddb8-11f0-547e-4dfdc35af822 for map and profile fit
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Event Details
Occultation UUID [and DB] : 9b64f090-ddb8-11f0-547e-4dfdc35af822 [observed]
Occultation Date + Time : 2025-10-01 at 21:18:59 UT +/- 0.01 min [1]
Object Designation : (54883) 2001 OS57
Orbit Class : MBA
Star Designation : GDR3 2632615597245990400
Star Coordinates (ICRF) : RA = 23 29 23.7429, DE = -05 37 21.621 [2]
Star Magnitudes : G = 12.14 mag, RP = 11.54 mag, BP = 12.57 mag
Object Magnitude : V = 18.15 mag
Estimated Magnitude Drop : 6.0 mag
Estimated Max. Duration : 0.5 sec
Object Mean Diameter : 5.5 km (src: astorb)
Speed of the shadow : 10.9 km/s
Elongation to Moon & Sun : 50° (sunlit = 69%), Sun = 162°
Cross-track uncertainty : 1.7 mas = 2 km = 0.43 path-width (1-sig)
RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#64
Note : FP:true
[1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0
(If error 404: link not valid which means no data available)
