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2025-04-04 / UCAC4 507-034705 / (238) Hypatia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Ettore Marmo O+ VID M300 IT GPS 20:53:54 20:57:59.100 20:58:09.800 21:00:59 0.6 1.2 10.70 187.2
2 show Alfonso Noschese O+ VID M300 IT GPS 20:57:04 20:57:58.640 20:58:07.090 20:59:04 0.20 0.15 8.45 147.9
3 show Antonio Vecchione O+ VID M250 IT NTP 20:57:03 20:57:57.8 20:58:06.8 20:59:00 0.2 0.2 9.00 157.5
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#111 : 0a652490-8560-11ef-78cd-5cc956fe650c [db: asteroids]

Using prediction 0a652490-8560-11ef-78cd-5cc956fe650c 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 195 km

From 3 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: 2025-04-04, 20:56 UT (JD = 2460770.372)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 38441.08.873 261°, 45° 2.450996e69774.40.0° None2019-09-26 not scaled 2019-05-07
# 38451.08.873 84°, 20° 2.450996e69774.40.0° None2019-09-26 not scaled 2019-05-07
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] : 0a652490-8560-11ef-78cd-5cc956fe650c [asteroids]

 Occultation Date + Time   : 2025-04-04 at 20:53:23 UT +/- 0.0 min  [1]
 Object Designation        : (238) Hypatia
 Orbit Class               : MBA
 Star Designation          : GDR3 3160455223815407872
 Star Coordinates (ICRF)   : RA = 07 02 20.3728, DE = +11 20 13.932  [2]
 Star Magnitudes           : G = 13.65 mag, RP = 13.21 mag, BP = 13.93 mag
 Object Magnitude          : V = 13.57 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 8.5 sec
 Object Mean Diameter      : 148.5 km  (src: astorb)
 Speed of the shadow       : 17.5 km/s
 Elongation to Moon & Sun  : 17° (sunlit = 48%), Sun = 90°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.00 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#111

 
 [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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