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2002-10-25 / TYC 1926-00284-1 / (407) Arachne

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Martin Dentel O+ VIS M750 DE RAD 03:29:00 03:32:38.1 03:32:40.8 03:35:00 0.4 0.3 2.70 37.5
2 show Wolfgang Rothe O+ VID L100 DE RAD++ 03:15:00 03:32:37.7 03:32:41.5 03:45:00 0.7 0.7 3.80 52.8
3 show Marcin Filipek O- VIS M320 PL 03:28:00 03:40:00
4 show Tomas Janik O? VIS M203 CZ 03:30:58 03:33:51
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#67 : a3b3e274-eec5-4d62-b306-1263c642353f [db: observed]

Using prediction a3b3e274-eec5-4d62-b306-1263c642353f 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:
Circular profile fit was not successful ...








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: 2002-10-25, 03:31 UT (JD = 2452572.647)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 813None22.626 43°, -58° 2.446447e66125.60.0° NoneNone not scaled 2016-01-04
# 814None22.626 241°, -63° 2.446447e66125.60.0° NoneNone not scaled 2016-01-04
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] : a3b3e274-eec5-4d62-b306-1263c642353f [observed]

 Occultation Date + Time   : 2002-10-25 at 03:35:15 UT +/- 0.02 min  [1]
 Object Designation        : (407) Arachne
 Orbit Class               : MBA
 Star Designation          : GDR3 0681181336406119552
 Star Coordinates (ICRF)   : RA = 07 59 14.3009, DE = +23 38 24.465  [2]
 Star Magnitudes           : G = 10.66 mag, RP = 10.39 mag, BP = 10.82 mag
 Object Magnitude          : V = 14.16 mag
 Estimated Magnitude Drop  : 3.5 mag
 Estimated Max. Duration   : 6.8 sec
 Object Mean Diameter      : 95 km  (src: astorb)
 Speed of the shadow       : 13.9 km/s
 Elongation to Moon & Sun  : 43° (sunlit = 87%), Sun = 94°
 Cross-track uncertainty   : 3.7 mas = 6 km = 0.06 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#67

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

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