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2013-02-09 / 4UC 602-026298 / (925) Alphonsina

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Carles Schnabel O+ VID M400 ES GPS++ 01:13:24 01:16:42.18 01:16:47.46 01:20:02 0.04 0.04 5.28 48.0
2 show C. Perello/A. Selva O+ VID M500 ES GPS++ 01:13:54 01:16:40.41 01:16:46.21 01:20:09 0.08 0.08 5.80 52.8
3 show Pietro Baruffetti O- VID M200 IT 01:14:26 01:17:26
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#118 : 5d435021-3c52-49ff-ab21-e2975371c0aa [db: observed]

Using prediction 5d435021-3c52-49ff-ab21-e2975371c0aa 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 = -3775.3, 36.3 km
Circular diameter = 137 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: 2013-02-09, 01:15 UT (JD = 2456332.552)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 301None7.878 294°, 41° 2.444471e611861.60.0° None2011-05-02 58.0 +/- 16.0 km 2011-02-18
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] : 5d435021-3c52-49ff-ab21-e2975371c0aa [observed]

 Occultation Date + Time   : 2013-02-09 at 01:23:28 UT +/- 0.06 min  [1]
 Object Designation        : (925) Alphonsina
 Orbit Class               : MBA
 Star Designation          : GDR3 3444014634056105472
 Star Coordinates (ICRF)   : RA = 05 54 09.2593, DE = +30 23 59.226  [2]
 Star Magnitudes           : G = 12.24 mag, RP = 11.75 mag, BP = 12.57 mag
 Object Magnitude          : V = 12.76 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 6.0 sec
 Object Mean Diameter      : 54 km  (src: astorb)
 Speed of the shadow       : 9.1 km/s
 Elongation to Moon & Sun  : 143° (sunlit = 2%), Sun = 128°
 Cross-track uncertainty   : 1.7 mas = 2 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#118

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

More Data and Informations
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