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2022-08-25 / 4UC 350-187717 / (928) Hildrun

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Stefano Sposetti O+ CCD M420 CH GPS++ 20:00:00 20:03:13.7 20:03:19.1 20:06:00 0.4 0.3 5.40 68.6
2 show Sven Andersson O+ CCD M355 DE GPS++ 20:01:35 20:02:30.0 20:02:34.0 20:03:34 0.5 0.5 4.00 50.8
3 show Anna Marciniak O- CCD M350 PL 20:00:21 20:04:24
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#62 : 8daa323f-fc66-4012-81c0-f8d0bb78c504 [db: observed]

Using prediction 8daa323f-fc66-4012-81c0-f8d0bb78c504 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 = 3129.9, 31.9 km
Circular diameter = 71 km

From 2 chords (CCD)








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: 2022-08-25, 20:03 UT (JD = 2459817.335)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1112None14.116 247°, -29° 2.450868e68949.30.0° NoneNone not scaled 2016-01-04
# 1113None14.116 86°, -63° 2.450868e68949.30.0° NoneNone not scaled 2016-01-04
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] : 8daa323f-fc66-4012-81c0-f8d0bb78c504 [observed]

 Occultation Date + Time   : 2022-08-25 at 20:05:26 UT +/- 0.02 min  [1]
 Object Designation        : (928) Hildrun
 Orbit Class               : MBA
 Star Designation          : GDR3 6859638954464367744
 Star Coordinates (ICRF)   : RA = 20 29 11.6641, DE = -20 05 51.913  [2]
 Star Magnitudes           : G = 14.46 mag, RP = 13.78 mag, BP = 14.99 mag
 Object Magnitude          : V = 15.39 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 5.3 sec
 Object Mean Diameter      : 67 km  (src: astorb)
 Speed of the shadow       : 12.7 km/s
 Elongation to Moon & Sun  : 168° (sunlit = 2%), Sun = 152°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62

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

More Data and Informations
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