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2022-03-12 / 4UC 521-005077 / (877) Walkure

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Marian Urbanik O+ CCD M400 SK GPS++ 17:44:44 17:44:51.56 17:44:52.04 17:45:06 0.06 0.06 0.48 18.1
2 show Peter Delincak O+ CCD M400 SK GPS++ 17:43:45 17:44:51.17 17:44:52.30 17:45:45 0.01 0.01 1.13 42.7
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#101 : 083b1d85-4653-466c-8f2d-d76174e9c6c2 [db: observed]

Using prediction 083b1d85-4653-466c-8f2d-d76174e9c6c2 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 = 917.9, 31.3 km
Circular diameter = 51 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).

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Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2022-03-12, 17:44 UT (JD = 2459651.239)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 1095None17.422 47°, 66° 2.445317e614334.20.0° NoneNone not scaled 2016-01-04
# 1096None17.422 262°, 71° 2.445317e614334.20.0° NoneNone not scaled 2016-01-04
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] : 083b1d85-4653-466c-8f2d-d76174e9c6c2 [observed]

 Occultation Date + Time   : 2022-03-12 at 17:42:56 UT +/- 0.0 min  [1]
 Object Designation        : (877) Walkure
 Orbit Class               : MBA
 Star Designation          : GDR3 0032239536352628864
 Star Coordinates (ICRF)   : RA = 02 57 55.9061, DE = +14 08 05.856  [2]
 Star Magnitudes           : G = 11.67 mag, RP = 10.74 mag, BP = 12.58 mag
 Object Magnitude          : V = 15.8 mag
 Estimated Magnitude Drop  : 4.2 mag
 Estimated Max. Duration   : 1.0 sec
 Object Mean Diameter      : 38 km  (src: astorb)
 Speed of the shadow       : 37.8 km/s
 Elongation to Moon & Sun  : 61° (sunlit = 71%), Sun = 54°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#101

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

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