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2016-09-24 / 2UC 39658821 / (21) Lutetia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Polak O+ VID M200 CZ GPS++ 01:33:02 01:34:58.20 01:35:01.72 01:37:01 0.16 0.16 3.52 86.2
2 show Karel Halir O+ VID M507 CZ GPS++ 01:33:30 01:34:58.72 01:35:02.20 01:37:30 0.04 0.04 3.48 85.3
3 show Radim Neuvirt O+ VID M432 CZ GPS++ 01:34:05 01:35:02.13 01:35:05.19 01:36:30 0.06 0.08 3.06 75.0
4 show Peter Delincak O- CCD M400 SK 01:33:00 01:37:00
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#131 : 0512bf52-cc2c-4227-a836-65d5a5186715 [db: observed]

Using prediction 0512bf52-cc2c-4227-a836-65d5a5186715 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:
Size = 124 x 96 km
a',b' = 62.0, 47.8 km
X0,Y0 = -419.8, 18.6 km
Mean diameter = 109 km

From 3 chords (VID)








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: 2016-09-24, 01:34 UT (JD = 2457655.565)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 120None8.168 54°, -7° 2.44482235116e612833.20.0° None2010-07-21 not scaled 2010-07-19
# 282None8.168 52°, -6° 2.44482235116e612833.20.0° None2010-07-21 99.0 +/- 5.0 km 2010-07-19
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] : 0512bf52-cc2c-4227-a836-65d5a5186715 [observed]

 Occultation Date + Time   : 2016-09-24 at 01:37:57 UT +/- 0.0 min  [1]
 Object Designation        : (21) Lutetia
 Orbit Class               : MBA
 Star Designation          : GDR3 0866253225241783936
 Star Coordinates (ICRF)   : RA = 07 25 00.0368, DE = +22 21 14.035  [2]
 Star Magnitudes           : G = 13.04 mag, RP = 12.32 mag, BP = 13.63 mag
 Object Magnitude          : V = 12.83 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 3.9 sec
 Object Mean Diameter      : 96 km  (src: astorb)
 Speed of the shadow       : 24.5 km/s
 Elongation to Moon & Sun  : 11° (sunlit = 43%), Sun = 72°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#131

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

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