Collaborative Occultation Resources and Archive (CORA)


Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

2025-08-21 / UCAC4 605-106890 / (5222) Ioffe

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Zdenek Sikac O+ VID T150 CZ NTP 20:25:40 20:26:39.77 20:26:40.59 20:27:40 0.080 0.080 0.82 11.2
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):
JPL#60 : bd8a9de0-8a36-11ef-78cd-b5caeffdbe78 [db: asteroids]

Using prediction bd8a9de0-8a36-11ef-78cd-b5caeffdbe78 for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2025-08-21, 20:26 UT (JD = 2460909.351)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 55051.09.739 280°, -12° 2.45723e63679.40.0° None2020-10-05 not scaled 2019-10-23
# 55061.09.739 54°, -52° 2.45723e63679.40.0° None2020-10-05 not scaled 2019-10-23
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : bd8a9de0-8a36-11ef-78cd-b5caeffdbe78 [asteroids]

 Occultation Date + Time   : 2025-08-21 at 20:27:34 UT +/- 0.0 min  [1]
 Object Designation        : (5222) Ioffe
 Orbit Class               : MBA
 Star Designation          : GDR3 1861601248887159936
 Star Coordinates (ICRF)   : RA = 20 21 39.9155, DE = +30 51 31.503  [2]
 Star Magnitudes           : G = 12.53 mag, RP = 12.02 mag, BP = 12.87 mag
 Object Magnitude          : V = 16.54 mag
 Estimated Magnitude Drop  : 4.0 mag
 Estimated Max. Duration   : 1.6 sec
 Object Mean Diameter      : 22.0 km  (src: astorb)
 Speed of the shadow       : 13.7 km/s
 Elongation to Moon & Sun  : 128° (sunlit = 2%), Sun = 131°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 0.86 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
(If error 404: link not valid which means no data available)

Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)