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2025-03-18 / J111941.89+025608.9 / (239) Adrastea

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Ferran Casarramona O+ VID M200 ES GPS 22:48:28 22:48:51.88 22:48:54.49 22:50:01 0.02 0.03 2.61 39.7
2 show Deborah Smith O+ CCD M280 ES NTP 22:47:01 22:48:58.19 22:49:00.77 22:51:02 0.01 0.01 2.58 39.2
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#63 : 47f3a840-8560-11ef-78cd-974cfbd72ec4 [db: asteroids]

Using prediction 47f3a840-8560-11ef-78cd-974cfbd72ec4 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

 Auto-Fit Result:
X0,Y0 = -1265.3, 12.7 km
Circular diameter = 42 km

From 2 chords (CCD,VID)








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2025-03-18, 22:48 UT (JD = 2460753.450)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1426None18.472 226°, -70° 2.45076e69993.50.0° NoneNone not scaled 2016-01-12
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] : 47f3a840-8560-11ef-78cd-974cfbd72ec4 [asteroids]

 Occultation Date + Time   : 2025-03-18 at 22:45:51 UT +/- 0.0 min  [1]
 Object Designation        : (239) Adrastea
 Orbit Class               : MBA
 Star Designation          : GDR3 3811111192559384704
 Star Coordinates (ICRF)   : RA = 11 19 41.8779, DE = +02 56 08.868  [2]
 Star Magnitudes           : G = 9.72 mag, RP = 9.29 mag, BP = 9.98 mag
 Object Magnitude          : V = 15.42 mag
 Estimated Magnitude Drop  : 5.7 mag
 Estimated Max. Duration   : 2.7 sec
 Object Mean Diameter      : 41.5 km  (src: astorb)
 Speed of the shadow       : 15.2 km/s
 Elongation to Moon & Sun  : 60° (sunlit = 82%), Sun = 171°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.91 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

 
 [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
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