2025-09-18 / UCAC4 375-132942 / (18016) Grondahl
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Jean-Louis Dumont
O+
VID
M280
FR
GPS
20:27:54
20:29:53.90
20:29:54.40
20:31:54
0.050
0.050
0.50
6.3
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 7797e690-ddb8-11f0-547e-2b3dbdfe6807 for map and profile fit
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Event Details
Occultation UUID [and DB] : 7797e690-ddb8-11f0-547e-2b3dbdfe6807 [observed]
Occultation Date + Time : 2025-09-18 at 20:27:49 UT +/- 0.0 min [1]
Object Designation : (18016) Grondahl
Orbit Class : MBA
Star Designation : GDR3 4103249855907814272
Star Coordinates (ICRF) : RA = 18 35 30.2170, DE = -15 09 16.246 [2]
Star Magnitudes : G = 13.62 mag, RP = 12.88 mag, BP = 14.21 mag
Object Magnitude : V = 18.46 mag
Estimated Magnitude Drop : 4.9 mag
Estimated Max. Duration : 0.4 sec
Object Mean Diameter : 4.9 km (src: astorb)
Speed of the shadow : 12.7 km/s
Elongation to Moon & Sun : 136° (sunlit = 9%), Sun = 102°
Cross-track uncertainty : 0.3 mas = 0 km = 0.08 path-width (1-sig)
RUWE and duplicate source : 0.99 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#55
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)
