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2020-10-08 / 4UC 384-156885 / (2106) Hugo

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Nosal O+ CCD M250 SK NTP 17:21:57 17:24:30.65 17:24:35.25 17:27:01 0.12 0.22 4.60 20.2
2 show Marek Harman O+ CCD M356 SK NTP 17:23:22 17:24:28.83 17:24:32.66 17:25:34 0.35 0.35 3.83 16.9
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#61 : b6d791b8-5408-4b0f-b81e-bb549b971a69 [db: observed]

Using prediction b6d791b8-5408-4b0f-b81e-bb549b971a69 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 = 3939.7, 19.2 km
Circular diameter = 25 km

From 2 chords (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: 2020-10-08, 17:23 UT (JD = 2459131.224)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 48111.06.928 313°, 74° 2.457228e61903.20.0° 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] : b6d791b8-5408-4b0f-b81e-bb549b971a69 [observed]

 Occultation Date + Time   : 2020-10-08 at 17:31:05 UT +/- 0.06 min  [1]
 Object Designation        : (2106) Hugo
 Orbit Class               : MBA
 Star Designation          : GDR3 2601059888407180928
 Star Coordinates (ICRF)   : RA = 22 31 06.2338, DE = -13 17 23.542  [2]
 Star Magnitudes           : G = 12.76 mag, RP = 12.28 mag, BP = 13.08 mag
 Object Magnitude          : V = 16.65 mag
 Estimated Magnitude Drop  : 3.9 mag
 Estimated Max. Duration   : 2.3 sec
 Object Mean Diameter      : 10 km  (src: astorb)
 Speed of the shadow       : 4.4 km/s
 Elongation to Moon & Sun  : 116° (sunlit = 63%), Sun = 138°
 Cross-track uncertainty   : 2.3 mas = 2 km = 0.28 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#61

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

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