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2022-08-03 / 4UC 495-131040 / (4709) Ennomos

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jan Manek O+ CCD M356 CZ GPS++ 23:03:47 23:05:48.91 23:05:50.91 23:07:46 0.44 0.44 2.00 33.4
2 show Jiri Polak O+ CCD M303 CZ GPS++ 23:03:49 23:05:54.88 23:05:58.76 23:07:49 0.38 0.25 3.88 64.8
3 show Roland Boninsegna O+ VID M400 BE GPS++ 23:05:01 23:06:32.33 23:06:35.05 23:08:00 0.16 0.16 2.72 45.4
4 show Michal Rottenborn O- CCD M254 CZ 23:03:51 23:07:51
5 show Daniel Blazewicz O- CCD M350 PL 23:00:01 23:11:21
6 show O. Schreurs et al O- VID M406 BE 23:05:32 23:07:31
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#85 : b0142028-11ed-4b1a-8107-abc4f6a1ab29 [db: observed]

Using prediction b0142028-11ed-4b1a-8107-abc4f6a1ab29 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 = 99 x 83 km
a',b' = 49.6, 41.5 km
X0,Y0 = 369.3, 36.9 km
Mean diameter = 91 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: 2022-08-03, 23:04 UT (JD = 2459795.461)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 43461.012.269 174°, 25° 2.451401e68394.50.0° 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] : b0142028-11ed-4b1a-8107-abc4f6a1ab29 [observed]

 Occultation Date + Time   : 2022-08-03 at 23:06:43 UT +/- 0.03 min  [1]
 Object Designation        : (4709) Ennomos
 Orbit Class               : JTRO
 Star Designation          : GDR3 1752352674020606976
 Star Coordinates (ICRF)   : RA = 20 26 25.0373, DE = +08 52 03.139  [2]
 Star Magnitudes           : G = 15.71 mag, RP = 15.08 mag, BP = 16.18 mag
 Object Magnitude          : V = 15.79 mag
 Estimated Magnitude Drop  : 0.8 mag
 Estimated Max. Duration   : 4.8 sec
 Object Mean Diameter      : 81 km  (src: astorb)
 Speed of the shadow       : 16.7 km/s
 Elongation to Moon & Sun  : 105° (sunlit = 34%), Sun = 153°
 Cross-track uncertainty   : 5.7 mas = 17 km = 0.22 path-width (1-sig)
 RUWE and duplicate source : 1.03 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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