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2010-03-02 / TYC 1985-01163-1 / (674) Rachele

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Roberto Di Luca O+ VID M250 IT GPS++ 21:58:00 22:06:49.54 22:06:56.74 22:12:00 0.12 0.12 7.20 77.8
2 show Simone Bolzoni O+ VIS M200 IT RAD 22:04:00 22:10:00
3 show Lorenzo Comolli O+ WEB M310 IT NTP 22:06:30 22:07:05.2 22:07:13.8 22:07:45 0.5 0.5 8.60 92.9
4 show Carlo Gualdoni O+ CCD M250 IT NTP 22:04:09 22:07:04.74 22:07:11.74 22:10:09 0.40 0.40 7.00 75.6
5 show Stefano Sposetti O- VID M200 CH 22:04:38 22:10:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#62 : ece18b80-b4ba-4b88-85e5-662e65f0d0ce [db: observed]

Using prediction ece18b80-b4ba-4b88-85e5-662e65f0d0ce 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 = 108 x 90 km
a',b' = 54.1, 44.8 km
X0,Y0 = -538.5, 21.4 km
Mean diameter = 98 km

From 3 chords (WEB,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: 2010-03-02, 22:06 UT (JD = 2455258.421)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 56761.030.975 187°, -36° 2.457417e6-2158.60.0° 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] : ece18b80-b4ba-4b88-85e5-662e65f0d0ce [observed]

 Occultation Date + Time   : 2010-03-02 at 22:02:05 UT +/- 0.02 min  [1]
 Object Designation        : (674) Rachele
 Orbit Class               : MBA
 Star Designation          : GDR3 4005038350478168576
 Star Coordinates (ICRF)   : RA = 11 44 29.0431, DE = +24 23 14.369  [2]
 Star Magnitudes           : G = 9.71 mag, RP = 9.46 mag, BP = 9.84 mag
 Object Magnitude          : V = 11.2 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 9.0 sec
 Object Mean Diameter      : 97 km  (src: astorb)
 Speed of the shadow       : 10.8 km/s
 Elongation to Moon & Sun  : 37° (sunlit = 93%), Sun = 159°
 Cross-track uncertainty   : 5.7 mas = 6 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 1.24 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62

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

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