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2022-03-24 / 4UC 454-033141 / (439) Ohio

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jerome Delpau O+ CCD L125 FR NTP 22:18:01 22:20:13.04 22:20:17.74 22:22:02 0.58 0.58 4.70 59.2
2 show R. Boninsegna et al O+ VID M305 BE GPS++ 22:18:58 22:20:25.97 22:20:31.33 22:21:56 0.08 0.08 5.36 67.5
3 show Benoit Goffin O+ CCD M250 BE GPS++ 22:16:35 22:20:27.23 22:20:32.22 22:23:33 0.09 0.09 4.99 62.9
4 show Olivier Schreurs O+ VID M406 BE GPS++ 22:19:30 22:20:28.88 22:20:33.64 22:21:31 0.04 0.04 4.76 60.0
5 show Sven Andersson O+ CCD M355 DE GPS++ 22:20:01 22:20:45.71 22:20:51.11 22:21:31 0.33 0.33 5.40 68.0
6 show Konrad Guhl O+ CCD M500 DE GPS++ 22:20:00 22:20:45.51 22:20:50.76 22:21:05 0.13 0.13 5.25 66.1
7 show Olaf Hofschulz O+ CCD L140 DE GPS+ 22:19:38 22:20:45.93 22:20:51.18 22:23:00 0.75 0.50 5.25 66.1
8 show Maciej Borkowski O+ VID M300 PL GPS++ 22:19:01 22:21:00.23 22:21:02.55 22:23:01 0.08 0.08 2.32 29.2
9 show Anna Marciniak O? CCD M350 PL GPS+ 22:19:41 22:20:51.52 22:20:52.61 22:21:58 0.25 0.25 1.09 13.7
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 : d1997854-3672-4d7c-a3ca-1765a5e90e43 [db: observed]

Using prediction d1997854-3672-4d7c-a3ca-1765a5e90e43 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 64 km
a',b' = 41.8, 31.8 km
X0,Y0 = 819.7, 20.2 km
Mean diameter = 73 km

From 9 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: 2022-03-24, 22:19 UT (JD = 2459663.430)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 22531.537.467 39°, -54° 2.451054e68609.40.0° None2018-07-19 not scaled 2018-07-18
# 22541.537.468 260°, -30° 2.451054e68609.40.0° 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] : d1997854-3672-4d7c-a3ca-1765a5e90e43 [observed]

 Occultation Date + Time   : 2022-03-24 at 22:12:52 UT +/- 0.02 min  [1]
 Object Designation        : (439) Ohio
 Orbit Class               : MBA
 Star Designation          : GDR3 3111485969510691968
 Star Coordinates (ICRF)   : RA = 07 20 07.8451, DE = +00 36 14.912  [2]
 Star Magnitudes           : G = 12.58 mag, RP = 12.15 mag, BP = 12.85 mag
 Object Magnitude          : V = 15.21 mag
 Estimated Magnitude Drop  : 2.7 mag
 Estimated Max. Duration   : 6.1 sec
 Object Mean Diameter      : 77 km  (src: astorb)
 Speed of the shadow       : 12.6 km/s
 Elongation to Moon & Sun  : 148° (sunlit = 54%), Sun = 106°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.02 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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