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2007-09-16 / HIP 116124 / (1330) Spiridonia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Wolfgang Beisker O+ VIS M270 DE 01:00:00 01:04:42.00 01:04:46.25 01:05:00 2.0 2.0 4.25 64.6
2 show C.P. Heidmann et al O+ VID M800 DE RAD+ 00:58:00 01:04:42.01 01:04:46.29 01:10:00 0.30 0.30 4.28 65.1
3 show Michael Parl O+ VID M203 DE RAD+ 00:59:00 01:04:41.80 01:04:46.04 01:09:00 0.10 0.10 4.24 64.4
4 show Bernd Gaehrken O+ VID L120 DE RAD 01:02:30 01:04:42.48 01:04:44.72 01:05:10 2.24 34.0
5 show Tomas Janik O+ VIS M200 CZ RAD++ 01:03:01 01:04:35.83 01:04:38.56 01:06:00 0.10 0.15 2.73 41.5
6 show Peter Kusnirak O+ CCD M650 CZ NTP 01:04:02 01:04:31.92 01:04:36.20 01:05:22 1.0 1.0 4.28 65.1
7 show Jan Manek O+ VID M203 CZ RAD++ 01:02:00 01:04:33.62 01:04:36.54 01:06:30 0.02 0.02 2.92 44.4
8 show Carlos Labordena O- VIS M235 ES 01:04:00 01:16:00
9 show Gerhard Dangl O- VID M254 AT 01:02:02 01:07:06
10 show Libor Smid O- VID M355 CZ 01:02:00 01:08:00
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

10 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#60 : cd6adb40-0dc9-4eaf-979a-28dbf6457ff7 [db: observed]

Using prediction cd6adb40-0dc9-4eaf-979a-28dbf6457ff7 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 = 110 x 32 km
a',b' = 54.8, 15.8 km
X0,Y0 = 1698.2, 41.2 km
Mean diameter = 59 km

From 7 chords (VID,VIS,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: 2007-09-16, 01:03 UT (JD = 2454359.544)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 45591.09.626 341°, 5° 2.457401e6-3041.50.0° None2020-10-05 not scaled 2019-10-23
# 45601.09.626 158°, 8° 2.457401e6-3041.50.0° 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] : cd6adb40-0dc9-4eaf-979a-28dbf6457ff7 [observed]

 Occultation Date + Time   : 2007-09-16 at 01:10:03 UT +/- 0.03 min  [1]
 Object Designation        : (1330) Spiridonia
 Orbit Class               : MBA
 Star Designation          : GDR3 2439826236294899200
 Star Coordinates (ICRF)   : RA = 23 31 46.3991, DE = -08 19 43.235  [2]
 Star Magnitudes           : G = 8.88 mag, RP = 8.47 mag, BP = 9.12 mag
 Object Magnitude          : V = 15.04 mag
 Estimated Magnitude Drop  : 6.2 mag
 Estimated Max. Duration   : 3.7 sec
 Object Mean Diameter      : 56 km  (src: astorb)
 Speed of the shadow       : 15.2 km/s
 Elongation to Moon & Sun  : 127° (sunlit = 18%), Sun = 175°
 Cross-track uncertainty   : 1.7 mas = 2 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

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

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