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2020-05-28 / 4UC 358-110170 / (1880) McCrosky

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show O. Schreurs et al O+ VID M200 BE GPS++ 22:45:50 22:46:52.15 22:46:55.35 22:47:59 0.64 0.64 3.20 28.2
2 show Simon Kidd O+ CCD M350 UK GPS++ 22:47:12 22:47:20.92 22:47:21.93 22:48:46 0.17 0.17 1.01 8.9
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#58 : ade23671-f4be-4554-8bb8-dbc6de5bb039 [db: observed]

Using prediction ade23671-f4be-4554-8bb8-dbc6de5bb039 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 = 246.7, 7.1 km
Circular diameter = 39 km

From 2 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: 2020-05-28, 22:45 UT (JD = 2458998.448)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 47541.012.997 191°, -70° 2.457201e61797.40.0° None2020-10-05 not scaled 2019-10-23
# 47551.012.997 5°, -72° 2.457201e61797.40.0° 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] : ade23671-f4be-4554-8bb8-dbc6de5bb039 [observed]

 Occultation Date + Time   : 2020-05-28 at 22:43:24 UT +/- 0.02 min  [1]
 Object Designation        : (1880) McCrosky
 Orbit Class               : MBA
 Star Designation          : GDR3 4123213654180224896
 Star Coordinates (ICRF)   : RA = 17 40 28.4106, DE = -18 24 46.398  [2]
 Star Magnitudes           : G = 13.71 mag, RP = 12.4 mag, BP = 15.72 mag
 Object Magnitude          : V = 15.63 mag
 Estimated Magnitude Drop  : 2.1 mag
 Estimated Max. Duration   : 1.8 sec
 Object Mean Diameter      : 16 km  (src: astorb)
 Speed of the shadow       : 8.8 km/s
 Elongation to Moon & Sun  : 122° (sunlit = 37%), Sun = 162°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#58

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

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