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2022-05-25 / 4UC 392-065312 / (1085) Amaryllis

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Eberhard Bredner O+ VID M254 DE GPS++ 01:30:00 01:37:19.89 01:37:26.45 01:40:00 0.24 0.24 6.56 79.4
2 show Simon Kidd O+ CCD M350 UK GPS++ 01:36:55 01:37:51.29 01:37:57.58 01:38:18 0.13 0.06 6.29 76.1
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#66 : 6a7b8eaa-1865-4fb3-9d19-e60fb4c8790a [db: observed]

Using prediction 6a7b8eaa-1865-4fb3-9d19-e60fb4c8790a 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:
Circular profile fit was not successful ...








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).

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Sky projection (artificial light) for occ. time: 2022-05-25, 01:37 UT (JD = 2459724.567)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 44341.018.143 325°, -75° 2.457436e62288.60.0° None2020-10-05 not scaled 2019-10-23
# 44351.018.143 184°, -64° 2.457436e62288.60.0° 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] : 6a7b8eaa-1865-4fb3-9d19-e60fb4c8790a [observed]

 Occultation Date + Time   : 2022-05-25 at 01:38:49 UT +/- 0.02 min  [1]
 Object Designation        : (1085) Amaryllis
 Orbit Class               : MBA
 Star Designation          : GDR3 4331746101685539328
 Star Coordinates (ICRF)   : RA = 16 20 34.5028, DE = -11 45 54.156  [2]
 Star Magnitudes           : G = 13.51 mag, RP = 12.82 mag, BP = 14.03 mag
 Object Magnitude          : V = 14.16 mag
 Estimated Magnitude Drop  : 1.1 mag
 Estimated Max. Duration   : 5.8 sec
 Object Mean Diameter      : 70 km  (src: astorb)
 Speed of the shadow       : 12.1 km/s
 Elongation to Moon & Sun  : 117° (sunlit = 27%), Sun = 170°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#66

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

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