2026-01-21 / UCAC4 570-039244 / (177) Irma
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Carsten Ziolek
O+
VID
M356
CH
GPS
18:41:07
18:41:33.159
18:41:40.446
18:42:07
0.088
0.088
7.29
77.3
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 bec8c120-de6b-11f0-4858-77d3f9f94d3a for map and profile fit
Map with groundtrack and observer stations
Reset Map to default
Event Details
Occultation UUID [and DB] : bec8c120-de6b-11f0-4858-77d3f9f94d3a [asteroids]
Occultation Date + Time : 2026-01-21 at 18:35:13 UT +/- 0.01 min [1]
Object Designation : (177) Irma
Orbit Class : MBA
Star Designation : GDR3 0869475618943664512
Star Coordinates (ICRF) : RA = 07 21 22.8154, DE = +23 55 00.441 [2]
Star Magnitudes : G = 13.9 mag, RP = 13.27 mag, BP = 14.08 mag
Object Magnitude : V = 13.14 mag
Estimated Magnitude Drop : 0.4 mag
Estimated Max. Duration : 6.9 sec
Object Mean Diameter : 73.2 km (src: astorb)
Speed of the shadow : 10.6 km/s
Elongation to Moon & Sun : 132° (sunlit = 9%), Sun = 167°
Cross-track uncertainty : 3.1 mas = 3 km = 0.05 path-width (1-sig)
RUWE and duplicate source : 16.59 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#131
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)
