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2020-07-21 / 4UC 559-002594 / (762) Pulcova

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Thierry Midavaine O+ CCD M264 FR GPS++ 00:55:03 00:56:36.67 00:56:45.54 00:58:01 0.45 0.45 8.87 140.1
2 show Peter Tickner O+ CCD M356 UK GPS 00:53:21 00:57:00.75 00:57:10.13 01:00:05 0.10 0.08 9.38 148.2
3 show Simon Kidd O+ CCD M350 UK GPS++ 00:54:00 00:57:04.91 00:57:14.14 00:59:30 0.06 0.05 9.23 145.8
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#131 : 908e5e1e-9032-44b6-ae3b-0d648d7a61eb [db: observed]

Using prediction 908e5e1e-9032-44b6-ae3b-0d648d7a61eb 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 = 168 x 77 km
a',b' = 83.9, 38.6 km
X0,Y0 = 4039.9, 21.9 km
Mean diameter = 114 km

From 3 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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2020-07-21, 00:56 UT (JD = 2459051.539)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 954None5.840 17°, -14° 2.450721e68330.50.0° NoneNone not scaled 2016-01-04
# 955None5.840 194°, -43° 2.450721e68330.50.0° 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] : 908e5e1e-9032-44b6-ae3b-0d648d7a61eb [observed]

 Occultation Date + Time   : 2020-07-21 at 00:56:28 UT +/- 0.02 min  [1]
 Object Designation        : (762) Pulcova
 Orbit Class               : MBA
 Star Designation          : GDR3 2787713158432231168
 Star Coordinates (ICRF)   : RA = 01 18 18.0339, DE = +21 40 21.052  [2]
 Star Magnitudes           : G = 13.48 mag, RP = 13.02 mag, BP = 13.77 mag
 Object Magnitude          : V = 14.48 mag
 Estimated Magnitude Drop  : 1.4 mag
 Estimated Max. Duration   : 8.7 sec
 Object Mean Diameter      : 137 km  (src: astorb)
 Speed of the shadow       : 15.8 km/s
 Elongation to Moon & Sun  : 96° (sunlit = 0%), Sun = 92°
 Cross-track uncertainty   : 2.3 mas = 5 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.99 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

More Data and Informations
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