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2022-05-08 / 4UC 389-068364 / (1085) Amaryllis

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Daniel Blazewicz O+ CCD M350 PL NTP+ 23:26:02 23:28:49.60 23:28:56.40 23:32:12 0.20 0.39 6.80 70.7
2 show Sven Andersson O+ CCD M355 DE GPS++ 23:28:31 23:29:29.05 23:29:36.48 23:30:30 0.12 0.12 7.43 77.3
3 show Christian Weber O+ VID M203 DE GPS++ 23:28:13 23:29:30.29 23:29:37.49 23:31:07 0.24 0.24 7.20 74.9
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#66 : 29beafed-18e1-4b9f-b8be-bdfbeceb2ec0 [db: observed]

Using prediction 29beafed-18e1-4b9f-b8be-bdfbeceb2ec0 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 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: 2022-05-08, 23:27 UT (JD = 2459708.477)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 44341.018.143 325°, -75° 2.457436e62272.50.0° None2020-10-05 not scaled 2019-10-23
# 44351.018.143 184°, -64° 2.457436e62272.50.0° 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] : 29beafed-18e1-4b9f-b8be-bdfbeceb2ec0 [observed]

 Occultation Date + Time   : 2022-05-08 at 23:25:42 UT +/- 0.02 min  [1]
 Object Designation        : (1085) Amaryllis
 Orbit Class               : MBA
 Star Designation          : GDR3 4331076567823496576
 Star Coordinates (ICRF)   : RA = 16 32 19.1219, DE = -12 19 29.673  [2]
 Star Magnitudes           : G = 13.7 mag, RP = 12.98 mag, BP = 14.28 mag
 Object Magnitude          : V = 14.44 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 6.8 sec
 Object Mean Diameter      : 70 km  (src: astorb)
 Speed of the shadow       : 10.4 km/s
 Elongation to Moon & Sun  : 109° (sunlit = 50%), Sun = 158°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.01 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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