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2022-02-26 / 4UC 528-013492 / (683) Lanzia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show J. Schenker et al O+ VID M450 CH GPS++ 21:03:35 21:05:37.90 21:05:53.74 21:08:13 0.08 0.08 15.84 122.0
2 show Michael Irzyk O+ CCD M356 FR GPS++ 21:00:00 21:04:52.00 21:05:01.25 21:15:00 1.03 1.03 9.25 71.2
3 show A. Leroy et al O+ CCD M250 FR GPS++ 21:03:03 21:04:49.85 21:05:01.86 21:07:18 0.60 0.60 12.01 92.5
4 show Stefano Sposetti O- CCD M420 CH 21:03:00 21:09:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#103 : 2d599f42-57ae-431a-a941-3fb442c562a0 [db: observed]

Using prediction 2d599f42-57ae-431a-a941-3fb442c562a0 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 = 117 km

From 3 chords (VID,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: 2022-02-26, 21:04 UT (JD = 2459637.378)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 238None8.629 245°, 42° 2.443951e615686.40.0° None2010-04-15 not scaled 2010-04-01
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] : 2d599f42-57ae-431a-a941-3fb442c562a0 [observed]

 Occultation Date + Time   : 2022-02-26 at 21:01:30 UT +/- 0.03 min  [1]
 Object Designation        : (683) Lanzia
 Orbit Class               : MBA
 Star Designation          : GDR3 3390973097914559104
 Star Coordinates (ICRF)   : RA = 05 25 30.5356, DE = +15 34 54.061  [2]
 Star Magnitudes           : G = 14.02 mag, RP = 13.46 mag, BP = 14.39 mag
 Object Magnitude          : V = 14.41 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 10.6 sec
 Object Mean Diameter      : 82 km  (src: astorb)
 Speed of the shadow       : 7.7 km/s
 Elongation to Moon & Sun  : 152° (sunlit = 19%), Sun = 103°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 2.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#103

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

More Data and Informations
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