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2022-09-17 / 4UC 583-040059 / (454) Mathesis

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Polak O+ CCD M303 CZ GPS++ 02:30:08 02:32:05.95 02:32:08.95 02:34:08 0.10 0.10 3.00 93.6
2 show Michal Rottenborn O+ CCD M254 CZ GPS++ 02:32:06 02:32:06.06 02:32:09.06 02:34:09 0.13 0.13 3.00 93.6
3 show Daniel Antuszewicz O+ CCD M203 PL NTP+ 02:31:27 02:32:21.25 02:32:22.45 02:33:27 0.15 0.15 1.20 37.4
4 show Marek Zawilski O- CCD M203 PL 02:31:39 02:33:00
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#129 : b9c595f8-9045-4564-a293-f51cd1b397a0 [db: observed]

Using prediction b9c595f8-9045-4564-a293-f51cd1b397a0 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 = 228 x 39 km
a',b' = 114.1, 19.7 km
X0,Y0 = -377.0, 33.1 km
Mean diameter = 95 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: 2022-09-17, 02:31 UT (JD = 2459839.605)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 54141.08.378 147°, 55° 2.457229e62610.60.0° None2020-10-05 not scaled 2019-10-23
# 54151.08.378 321°, 28° 2.457229e62610.60.0° None2020-10-05 not scaled 2019-10-23
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] : b9c595f8-9045-4564-a293-f51cd1b397a0 [observed]

 Occultation Date + Time   : 2022-09-17 at 02:34:22 UT +/- 0.01 min  [1]
 Object Designation        : (454) Mathesis
 Orbit Class               : MBA
 Star Designation          : GDR3 0869082376034546688
 Star Coordinates (ICRF)   : RA = 07 41 08.4467, DE = +26 24 20.359  [2]
 Star Magnitudes           : G = 13.58 mag, RP = 13.09 mag, BP = 13.9 mag
 Object Magnitude          : V = 15.01 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 2.6 sec
 Object Mean Diameter      : 82 km  (src: astorb)
 Speed of the shadow       : 31.2 km/s
 Elongation to Moon & Sun  : 37° (sunlit = 58%), Sun = 62°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#129

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

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