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2021-11-19 / 4UC 484-049141 / (34) Circe

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Joan Aragones O+ CCD L102 ES NTP+ 04:34:09 04:34:44.97 04:34:50.97 04:35:27 0.50 0.50 6.00 180.6
2 show Oscar Canales O+ CCD M200 ES GPS++ 04:32:32 04:34:35.66 04:34:40.61 O4:36:33 0.31 0.25 4.95 149.0
3 show David Lafuente O+ VID M200 ES GPS++ 04:31:42 04:34:35.57 04:34:40.67 04:37:26 0.45 0.45 5.10 153.5
4 show Faustino Garcia O+ CCD M250 ES GPS++ 04:33:19 04:34:17.43 04:34:21.43 04:35:18 0.40 0.40 4.00 120.4
5 show Juan Collada O+ CCD M200 ES GPS+ 04:32:27 04:34:20.55 04:34:23.56 04:36:21 0.49 0.49 3.01 90.6
6 show C. Perello/A. Selva O- CCD M500 ES 04:32:50 04:36:48
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#? : 005bfcb5-605e-4f23-92f9-af25fa22efa4 [db: observed]

Using prediction 005bfcb5-605e-4f23-92f9-af25fa22efa4 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 = 766 x 95 km
a',b' = 382.9, 47.4 km
X0,Y0 = 23878.6, 10537.2 km
Mean diameter = 270 km

From 5 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: 2021-11-19, 04:33 UT (JD = 2459537.690)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 128None12.175 94°, 35° 2.443602e615935.70.0° size from AO is 117+/-14 km2013-07-23 96.0 +/- 10.0 km 2011-03-28
# 129None12.175 275°, 51° 2.443602e615935.70.0° size from AO is 116+/-11 km2013-07-23 107.0 +/- 10.0 km 2011-03-28
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] : 005bfcb5-605e-4f23-92f9-af25fa22efa4 [observed]

 Occultation Date + Time   : 2021-11-19 at 04:22:23 UT +/- 4.02 min  [1]
 Object Designation        : (34) Circe
 Orbit Class               : MBA
 Star Designation          : GDR3 3796305340778689280
 Star Coordinates (ICRF)   : RA = 11 48 03.8317, DE = +01 17 30.666  [2]
 Star Magnitudes           : G = 16.99 mag, RP = 15.83 mag, BP = 18.42 mag
 Object Magnitude          : V = 17.49 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 3.8 sec
 Object Mean Diameter      : 114 km  (src: astorb)
 Speed of the shadow       : 30.1 km/s
 Elongation to Moon & Sun  : 122° (sunlit = 100%), Sun = 60°
 Cross-track uncertainty   : 1700.0 mas = 1218 km = 10.74 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#?

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

More Data and Informations
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