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2011-08-11 / TYC 2224-01391-1 / (4709) Ennomos

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show G. Vaudescal et al O+ CCD M305 FR GPS++ 20:02:37 20:03:39.63 20:03:45.27 20:04:55 0.10 0.10 5.64 75.6
2 show Stefano Sposetti O+ VID M280 CH GPS++ 20:02:50 20:03:07.86 20:03:14.22 20:07:00 0.01 0.02 6.36 85.2
3 show Peter Delincak O+ CCD M355 SK RAD++ 20:00:00 20:02:27.97 20:02:34.98 20:05:00 0.25 0.25 7.01 93.9
4 show Hayato Watanabe O- VID L130 JP
5 show Philippe Bernascolle O- VID M280 FR 20:02:35 20:04:35
6 show E. Frappa/A. Klotz O- CCD M250 FR 20:02:46 20:05:57
7 show Michele Bigi O- VID M200 IT 20:01:00 20:05:00
8 show Xuejun Zhang O- VIS M200 CN 19:30:00 20:00:00
9 show Roman Kostenko O- VIS B90 UA 20:00:00 20:03:08
10 show Vladimir Stanchenko O- VIS M200 UA 19:58:00 20:04:00
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#85 : 96cd0d7d-5bca-4060-aa43-7b7d4a43d2be [db: observed]

Using prediction 96cd0d7d-5bca-4060-aa43-7b7d4a43d2be 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 = 111 x 96 km
a',b' = 55.3, 47.9 km
X0,Y0 = -314.6, 27.6 km
Mean diameter = 103 km

From 3 chords (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: 2011-08-11, 20:03 UT (JD = 2455785.335)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 43461.012.269 174°, 25° 2.451401e64384.30.0° None2019-09-26 not scaled 2019-05-07
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] : 96cd0d7d-5bca-4060-aa43-7b7d4a43d2be [observed]

 Occultation Date + Time   : 2011-08-11 at 19:57:34 UT +/- 0.04 min  [1]
 Object Designation        : (4709) Ennomos
 Orbit Class               : JTRO
 Star Designation          : GDR3 1877445245782182784
 Star Coordinates (ICRF)   : RA = 22 41 24.4102, DE = +24 50 22.923  [2]
 Star Magnitudes           : G = 8.84 mag, RP = 8.17 mag, BP = 9.34 mag
 Object Magnitude          : V = 15.96 mag
 Estimated Magnitude Drop  : 7.1 mag
 Estimated Max. Duration   : 6.0 sec
 Object Mean Diameter      : 81 km  (src: astorb)
 Speed of the shadow       : 13.4 km/s
 Elongation to Moon & Sun  : 60° (sunlit = 96%), Sun = 136°
 Cross-track uncertainty   : 3.7 mas = 11 km = 0.14 path-width (1-sig)
 RUWE and duplicate source : 1.25 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#85

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

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