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2024-11-09 / TYC 0636-00903-1 / (207) Hedda

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Vaclav Priban O+ VID M170 CZ GPS 18:55:00 18:56:48.68 18:56:54.71 18:58:24 0.05 0.05 6.03 62.7
2 show Jiri Kubanek O+ VID M303 CZ GPS 18:55:41 18:56:53.546 18:56:54.034 18:58:11 0.010 0.015 0.49 5.1
3 show Carsten Ziolek O- VID M356 CH GPS 18:57:04 18:58:04
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#83 : 6dadb120-c359-11ef-5276-35affcf79c15 [db: observed]
JPL#81 : 3228c8b0-8556-11ef-78cd-a5da637df290 [db: asteroids]
JPL#81 : 5fc79a50-8261-11ef-6618-6f046787577a [db: asteroids]

Using prediction 6dadb120-c359-11ef-5276-35affcf79c15 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:
X0,Y0 = 1007.8, 27.5 km
Circular diameter = 64 km

From 2 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: 2024-11-09, 18:56 UT (JD = 2460624.289)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 47991.030.105 264°, -48° 2.457358e63266.30.0° None2020-10-05 not scaled 2019-10-23
# 48001.030.104 2°, -61° 2.457358e63266.30.0° 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

Occ by (207) Hedda on 2024-11-09

+−
↦km
Unavailable
300 km
CORA | LeaFlet| | OSM | Stamen

Event Details 
 Occultation UUID [and DB] : 6dadb120-c359-11ef-5276-35affcf79c15 [observed]

 Occultation Date + Time   : 2024-11-09 at 18:53:44 UT +/- 0.01 min  [1]
 Object Designation        : (207) Hedda
 Orbit Class               : MBA
 Star Designation          : GDR3 0077363944528337792
 Star Coordinates (ICRF)   : RA = 02 11 08.9208, DE = +14 34 54.796  [2]
 Star Magnitudes           : G = 9.1 mag, RP = 8.68 mag, BP = 9.36 mag
 Object Magnitude          : V = 13.23 mag
 Estimated Magnitude Drop  : 4.2 mag
 Estimated Max. Duration   : 5.7 sec
 Object Mean Diameter      : 58.7 km  (src: astorb)
 Speed of the shadow       : 10.4 km/s
 Elongation to Moon & Sun  : 71° (sunlit = 56%), Sun = 168°
 Cross-track uncertainty   : 1.4 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 3.32 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#83

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

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