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2023-10-11 / TYC 4695-00746-1 / (590) Tomyris

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jiri Polak O+ VID M300 CZ GPS 01:55:27 01:57:27.44 01:57:29.62 01:59:27 0.03 0.03 2.18 25.1
2 show Michal Rottenborn O+ VID M254 CZ GPS 01:55:27 01:57:27.30 01:57:29.60 01:59:27 0.05 0.05 2.30 26.4
3 show Jiri Kubanek O+ VID M303 CZ GPS 01:55:55 01:57:26.49 01:57:26.77 01:58:55 0.02 0.02 0.28 3.2
4 show Rui Goncalves O- VID M256 PT GPS 01:58:21 02:00:40
5 show Tomas Janik O- CCD T432 CZ GPS 1:55:55. 1:58:55.
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#63 : 6b5317aa-b3ff-4057-966d-be670ed37f4a [db: observed]

Using prediction 6b5317aa-b3ff-4057-966d-be670ed37f4a 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 29 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: 2023-10-11, 01:57 UT (JD = 2460228.581)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 3672.05.552 274°, -30° 2.445323e614905.60.0° None2017-04-03 not scaled 2017-03-31
# 3682.05.552 113°, -35° 2.445323e614905.60.0° None2017-04-03 not scaled 2017-03-31
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] : 6b5317aa-b3ff-4057-966d-be670ed37f4a [observed]

 Occultation Date + Time   : 2023-10-11 at 02:03:15 UT +/- 0.03 min  [1]
 Object Designation        : (590) Tomyris
 Orbit Class               : MBA
 Star Designation          : GDR3 2490981220935629056
 Star Coordinates (ICRF)   : RA = 02 05 14.3967, DE = -05 10 50.534  [2]
 Star Magnitudes           : G = 11.64 mag, RP = 11.24 mag, BP = 11.88 mag
 Object Magnitude          : V = 14.29 mag
 Estimated Magnitude Drop  : 2.7 mag
 Estimated Max. Duration   : 3.5 sec
 Object Mean Diameter      : 40 km  (src: astorb)
 Speed of the shadow       : 11.5 km/s
 Elongation to Moon & Sun  : 129° (sunlit = 12%), Sun = 161°
 Cross-track uncertainty   : 5.0 mas = 6 km = 0.17 path-width (1-sig)
 RUWE and duplicate source : 0.84 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

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

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