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2022-02-28 / 4UC 630-020758 / (784) Pickeringia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Kubanek O+ CCD M200 DE GPS++ 20:03:46 20:05:45.71 20:05:52.80 20:07:55 0.18 0.26 7.09 66.6
2 show Michal Rottenborn O+ CCD M254 CZ GPS++ 20:03:49 20:05:43.72 20:05:49.18 20:07:49 0.15 0.10 5.46 51.3
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#68 : f73de933-9a7b-4d4c-849b-8bf94c8ee8f9 [db: observed]

Using prediction f73de933-9a7b-4d4c-849b-8bf94c8ee8f9 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 = -1415.6, 25.8 km
Circular diameter = 74 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).

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Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2022-02-28, 20:04 UT (JD = 2459639.336)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 974None13.170 103°, 68° 2.448377e611262.30.0° NoneNone not scaled 2016-01-04
# 975None13.170 282°, 35° 2.448377e611262.30.0° 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] : f73de933-9a7b-4d4c-849b-8bf94c8ee8f9 [observed]

 Occultation Date + Time   : 2022-02-28 at 20:03:40 UT +/- 0.02 min  [1]
 Object Designation        : (784) Pickeringia
 Orbit Class               : MBA
 Star Designation          : GDR3 0186341730280953216
 Star Coordinates (ICRF)   : RA = 05 03 25.2291, DE = +35 51 59.336  [2]
 Star Magnitudes           : G = 13.91 mag, RP = 12.96 mag, BP = 14.79 mag
 Object Magnitude          : V = 15.77 mag
 Estimated Magnitude Drop  : 2.1 mag
 Estimated Max. Duration   : 9.5 sec
 Object Mean Diameter      : 89 km  (src: astorb)
 Speed of the shadow       : 9.4 km/s
 Elongation to Moon & Sun  : 123° (sunlit = 5%), Sun = 98°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 2.72 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#68

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

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