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2020-03-28 / 4UC 525-016205 / (97) Klotho

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Gregor Krannich O+ CCD M350 DE GPS++ 19:56:31 19:59:08.68 19:59:09.68 20:02:01 0.10 0.10 1.00 27.5
2 show Olivier Dechambre O+ CCD M279 FR GPS++ 19:53:00 19:58:48.71 19:58:51.97 20:03:00 0.15 0.11 3.26 89.6
3 show Gerhard Dangl O+ VID M254 AT GPS++ 19:58:28 19:59:13.18 19:59:15.70 20:01:21 0.04 0.04 2.52 69.3
4 show A. Leroy et al O+ CCD M200 FR GPS++ 19:57:00 19:58:49.83 19:58:52.98 19:59:00 0.15 0.30 3.15 86.6
5 show Bjoern Kattentidt O+ VID M279 DE GPS++ 19:56:56 19:59:07.88 19:59:10.00 20:00:54 0.12 0.24 2.12 58.3
6 show Marek Harman O- CCD M250 SK 19:57:03 20:02:15
7 show Jiri Kubanek O- VID M203 CZ 19:57:15 20:01:17
8 show Jiri Polak O- VID M303 CZ 19:57:12 20:01:12
9 show Michal Rottenborn O- VID M303 CZ 19:57:12 20:01:12
10 show Karel Halir O- VID M507 CZ 19:57:13 20:01:13
11 show Roland Boninsegna O- VID M400 BE 19:57:02 20:00:55
12 show Marcin Filipek O- VID M250 PL 19:57:20 20:01:40
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

12 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#123 : 428bde00-e917-4377-8c9a-75829cfd9a3f [db: observed]

Using prediction 428bde00-e917-4377-8c9a-75829cfd9a3f 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 = 120 x 81 km
a',b' = 59.9, 40.7 km
X0,Y0 = 711.1, 26.9 km
Mean diameter = 99 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: 2020-03-28, 19:59 UT (JD = 2458937.333)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 321None35.251 359°, 30° 2.433224e625713.30.0° None2013-07-24 85.0 +/- 9.0 km 2011-04-21
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] : 428bde00-e917-4377-8c9a-75829cfd9a3f [observed]

 Occultation Date + Time   : 2020-03-28 at 19:56:38 UT +/- 0.0 min  [1]
 Object Designation        : (97) Klotho
 Orbit Class               : MBA
 Star Designation          : GDR3 3347573312383550208
 Star Coordinates (ICRF)   : RA = 05 45 58.8632, DE = +14 49 45.292  [2]
 Star Magnitudes           : G = 13.0 mag, RP = 12.63 mag, BP = 13.23 mag
 Object Magnitude          : V = 12.29 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 83 km  (src: astorb)
 Speed of the shadow       : 27.5 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 17%), Sun = 78°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 3.44 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#123

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

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