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2006-05-07 / TYC 5558-01048-1 / (152) Atala

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show David Dunham O+ VID M200 US GPS++ 03:43:38.51 03:43:41.51 3.00 40.5
2 show Joe Sedlak O+ VIS M250 US RAD 03:43:40.0 03:43:42.7 2.70 36.5
3 show Joan Dunham O+ VID M200 US GPS++ 03:43:35.98 03:43:40.14 4.16 56.2
4 show Wayne Warren O+ VIS M406 US RAD 03:41:15 03:43:36.35 03:43:40.00 03:44:10 0.5 0.5 3.65 49.3
5 show Don Gardner O+ VID US RAD 03:43:36.0 03:43:39.1 3.10 41.9
6 show Gary Frishkorn O+ VID US GPS++ 03:43:36.99 03:43:39.83 2.84 38.3
7 show Alin Tolea O+ VID M600 US
8 show John Littleton O+ VID US RAD 03:43:54 03:43:56 2.00 27.0
9 show Jose Ripero O+ VIS M340 ES RAD 03:30:00 03:37:21.6 03:37:24.7 03:40:00 0.1 0.1 3.10 41.9
10 show Bob Cadmus O+ VID M610 US RAD 03:45:05.41 03:45:08.99 0.01 0.01 3.58 48.3
11 show David Dunham O- VID M130 US
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

11 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#69 : d1780a17-dbe8-4a57-8c82-a59ed978443d [db: observed]

Using prediction d1780a17-dbe8-4a57-8c82-a59ed978443d 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 = 84 x 49 km
a',b' = 42.1, 24.5 km
X0,Y0 = -410.5, 31.6 km
Mean diameter = 64 km

From 9 chords (VID,VIS)








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: 2006-05-07, 03:43 UT (JD = 2453862.655)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 166None6.245 347°, 47° 2.444935e68927.70.0° preliminary model, size from AO is 82+/-9 km2013-07-23 65.0 +/- 8.0 km 2011-03-28
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] : d1780a17-dbe8-4a57-8c82-a59ed978443d [observed]

 Occultation Date + Time   : 2006-05-07 at 03:42:13 UT +/- 0.03 min  [1]
 Object Designation        : (152) Atala
 Orbit Class               : MBA
 Star Designation          : GDR3 6304027382161334400
 Star Coordinates (ICRF)   : RA = 14 09 23.2664, DE = -12 23 44.440  [2]
 Star Magnitudes           : G = 9.81 mag, RP = 9.48 mag, BP = 10.0 mag
 Object Magnitude          : V = 13.09 mag
 Estimated Magnitude Drop  : 3.3 mag
 Estimated Max. Duration   : 5.3 sec
 Object Mean Diameter      : 71 km  (src: astorb)
 Speed of the shadow       : 13.5 km/s
 Elongation to Moon & Sun  : 57° (sunlit = 68%), Sun = 168°
 Cross-track uncertainty   : 10.0 mas = 16 km = 0.23 path-width (1-sig)
 RUWE and duplicate source : 1.24 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#69

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

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