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2025-04-07 / UCAC4 533-042776 / (79) Eurynome

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Andreas Schweizer O+ VID M250 CH GPS 23:16:08 23:16:36.287 23:16:41.087 23:17:08 0.360 0.360 4.80 76.8
2 show Arnaud Leroy O+ VID M300 FR GPS 23:14:54 23:16:22.18 23:16:26.88 23:17:54 0.15 0.15 4.70 75.2
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#138 : a8580250-852c-11ef-78cd-92d0bcff3fd0 [db: asteroids]

Using prediction a8580250-852c-11ef-78cd-92d0bcff3fd0 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 = -63.9, 52.4 km
Circular diameter = 85 km

From 2 chords (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: 2025-04-07, 23:15 UT (JD = 2460773.469)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 496None5.978 54°, 24° 2.442337e618436.50.0° NoneNone not scaled 2013-02-11
# 497None5.978 228°, 30° 2.442337e618436.50.0° NoneNone not scaled 2013-02-11
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] : a8580250-852c-11ef-78cd-92d0bcff3fd0 [asteroids]

 Occultation Date + Time   : 2025-04-07 at 23:12:17 UT +/- 0.0 min  [1]
 Object Designation        : (79) Eurynome
 Orbit Class               : MBA
 Star Designation          : GDR3 3169003999736936320
 Star Coordinates (ICRF)   : RA = 07 37 37.7284, DE = +16 32 08.790  [2]
 Star Magnitudes           : G = 13.42 mag, RP = 13.27 mag, BP = 13.51 mag
 Object Magnitude          : V = 12.21 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 4.2 sec
 Object Mean Diameter      : 66.5 km  (src: astorb)
 Speed of the shadow       : 16.0 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 78%), Sun = 95°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.08 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#138

 
 [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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