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2022-03-11 / 4UC 445-033109 / (439) Ohio

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Marian Urbanik O+ CCD M400 SK GPS++ 19:36:29 19:36:43.28 19:36:49.69 19:37:06 0.07 0.07 6.41 63.5
2 show Peter Delincak O+ CCD M400 SK GPS++ 19:35:45 19:36:43.81 19:36:50.10 19:37:45 0.01 0.01 6.29 62.3
3 show Leszek Benedyktowicz O+ CCD M203 PL GPS++ 19:35:50 19:36:50.25 19:36:56.12 19:37:05 0.03 0.03 5.87 58.1
4 show Marcin Filipek O+ CCD M250 PL GPS++ 19:35:30 19:36:52.60 19:36:56.45 19:38:00 0.05 0.05 3.85 38.1
5 show Marek Zawilski O+ CCD M203 PL GPS+ 19:36:00 19:37:01.28 19:37:07.71 19:37:45 0.09 0.09 6.43 63.7
6 show Maciej Borkowski O+ VID M300 PL GPS++ 19:34:44 19:37:13.72 19:37:18.44 19:39:34 0.04 0.04 4.72 46.7
7 show Marek Harman O- CCD M250 SK 19:35:16 19:38:16
8 show Petr Zeleny O- CCD M254 CZ 19:34:11 19:39:01
9 show Daniel Blazewicz O- CCD M350 PL 19:35:02 19:39:03
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

9 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#103 : 8a52b356-f168-4d6a-a4fb-a20d7a3720d4 [db: observed]

Using prediction 8a52b356-f168-4d6a-a4fb-a20d7a3720d4 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 = 73 x 62 km
a',b' = 36.3, 31.0 km
X0,Y0 = 638.8, 21.1 km
Mean diameter = 67 km

From 6 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: 2022-03-11, 19:36 UT (JD = 2459650.317)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 22531.537.467 39°, -54° 2.451054e68596.30.0° None2018-07-19 not scaled 2018-07-18
# 22541.537.468 260°, -30° 2.451054e68596.30.0° None2018-07-19 not scaled 2018-07-18
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] : 8a52b356-f168-4d6a-a4fb-a20d7a3720d4 [observed]

 Occultation Date + Time   : 2022-03-11 at 19:28:29 UT +/- 0.07 min  [1]
 Object Designation        : (439) Ohio
 Orbit Class               : MBA
 Star Designation          : GDR3 3110129240883452160
 Star Coordinates (ICRF)   : RA = 07 15 53.2497, DE = -01 01 15.232  [2]
 Star Magnitudes           : G = 11.5 mag, RP = 10.57 mag, BP = 12.4 mag
 Object Magnitude          : V = 15.03 mag
 Estimated Magnitude Drop  : 3.6 mag
 Estimated Max. Duration   : 7.7 sec
 Object Mean Diameter      : 77 km  (src: astorb)
 Speed of the shadow       : 9.9 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 63%), Sun = 117°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#103

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

More Data and Informations
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