2025-10-19 / UCAC4 338-210416 / (4857) Altgamia
# OBS Observer Occ Meth. Instr. CC
TSRC UT1 UT2 UT3 UT4 UT2E UT3E Dur. Chrd
1
show Deborah Smith
O+
VID
M300
ES
GPS
22:26:50
22:27:51.342
22:27:51.653
22:28:50
0.012
0.012
0.31
4.2
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 9622f640-ddb8-11f0-547e-d6c3f3b7f0fb for map and profile fit
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Event Details
Occultation UUID [and DB] : 9622f640-ddb8-11f0-547e-d6c3f3b7f0fb [observed]
Occultation Date + Time : 2025-10-19 at 22:25:31 UT +/- 0.0 min [1]
Object Designation : (4857) Altgamia
Orbit Class : MBA
Star Designation : GDR3 2387582460264745728
Star Coordinates (ICRF) : RA = 23 42 45.2485, DE = -22 28 55.880 [2]
Star Magnitudes : G = 12.57 mag, RP = 12.11 mag, BP = 12.87 mag
Object Magnitude : V = 17.97 mag
Estimated Magnitude Drop : 5.4 mag
Estimated Max. Duration : 0.6 sec
Object Mean Diameter : 7.6 km (src: astorb)
Speed of the shadow : 13.6 km/s
Elongation to Moon & Sun : 150° (sunlit = 2%), Sun = 136°
Cross-track uncertainty : 0.7 mas = 1 km = 0.14 path-width (1-sig)
RUWE and duplicate source : 1.18 mas, dup.src = 0 (0:false, 1:true)
Ephemeris Reference : JPL#63
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)
