2025-10-31 / UCAC4 523-027294 / (687170) 2011 QF99
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Daniel Blazewicz
O+
VID
M350
PL
GPS
01:01:55
01:11:32.57
01:11:32.97
01:20:33
0.100
0.100
0.40
3.8
2
show Martin Gutekunst
O-
VID
L280
DE
GPS
01:03:41
::
::
01:23:44
3
show Tomas Janik
O-
CCD
T600
CZ
GPS
01:10:20
::
::
01:17:01
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km |
More 3 observations found in db: sodis
Available (probably) matching predictions (click on the link to switch):
Using prediction a9a94890-ddb8-11f0-547e-f36dffbb32f7 for map and profile fit
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Event Details
Occultation UUID [and DB] : a9a94890-ddb8-11f0-547e-f36dffbb32f7 [observed]
Occultation Date + Time : 2025-10-31 at 01:13:36 UT +/- 3.27 min [1]
Object Designation : (687170) 2011 QF99
Orbit Class : None
Star Designation : GDR3 3356641053499837824
Star Coordinates (ICRF) : RA = 06 27 07.6617, DE = +14 32 36.899 [2]
Star Magnitudes : G = 14.05 mag, RP = 13.35 mag, BP = 14.6 mag
Object Magnitude : V = 22.25 mag
Estimated Magnitude Drop : 8.2 mag
Estimated Max. Duration : 4.1 sec
Object Mean Diameter : 38.3 km (src: astorb)
Speed of the shadow : 9.4 km/s
Elongation to Moon & Sun : 131° (sunlit = 64%), Sun = 121°
Cross-track uncertainty : 73.0 mas = 862 km = 22.51 path-width (1-sig)
RUWE and duplicate source : 1.05 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#13
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)
