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2021-08-31 / 4UC 465-079294 / (276) Adelheid

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Anonymous O+ CCD V112 FR NTP 21:27:04 21:31:00.80 21:31:10.63 21:32:02 0.12 0.12 9.83 86.5
2 show Anonymous O+ CCD V112 FR NTP 21:27:08 21:30:48.00 21:30:54.22 21:32:06 0.33 0.33 6.22 54.7
3 show Fernand Emering O+ VID M460 LU GPS++ 21:29:47 21:30:02.00 21:30:13.70 21:30:29 0.02 0.04 11.70 103.0
4 show Guenther Neue O+ CCD M270 DE NTP+ 21:29:21 21:29:44.52 21:29:58.02 21:30:57 0.15 0.15 13.50 118.8
5 show Jean-Marie Laugier O- CCD V112 FR 21:27:07 21:32:06
6 show Patrick Antouly O- CCD V112 FR 21:27:03 21:32:01
7 show Anonymous O- CCD V112 FR 21:27:02 21:32:00
8 show Anonymous O- CCD V112 FR 21:27:02 21:32:00
9 show Anonymous O- CCD V112 FR 21:27:17 21:32:15
10 show Anonymous O- CCD V112 FR 21:28:17 21:30:02
11 show Johann Helderle O- CCD V112 LU 21:27:55 21:32:52
12 show Harrie Rutten O- VID M356 NL 21:27:00 21:31:05
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

12 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#75 : b4206daf-ee7e-4dc6-a558-61825d2fac14 [db: observed]

Using prediction b4206daf-ee7e-4dc6-a558-61825d2fac14 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 = 125 x 95 km
a',b' = 62.7, 47.4 km
X0,Y0 = -3006.4, 32.4 km
Mean diameter = 109 km

From 4 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: 2021-08-31, 21:30 UT (JD = 2459458.396)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 189None6.319 9°, -4° 2.445975e613483.40.0° size from AO is 104+/-11 km2013-07-23 125.0 +/- 15.0 km 2011-03-28
# 190None6.319 199°, -20° 2.445975e613483.40.0° size from AO is 104+/-12 km2013-07-23 117.0 +/- 15.0 km 2011-03-28
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] : b4206daf-ee7e-4dc6-a558-61825d2fac14 [observed]

 Occultation Date + Time   : 2021-08-31 at 21:38:00 UT +/- 0.12 min  [1]
 Object Designation        : (276) Adelheid
 Orbit Class               : MBA
 Star Designation          : GDR3 4277241038256485632
 Star Coordinates (ICRF)   : RA = 18 25 59.8476, DE = +02 51 11.362  [2]
 Star Magnitudes           : G = 12.77 mag, RP = 11.93 mag, BP = 13.52 mag
 Object Magnitude          : V = 14.3 mag
 Estimated Magnitude Drop  : 1.8 mag
 Estimated Max. Duration   : 13.8 sec
 Object Mean Diameter      : 122 km  (src: astorb)
 Speed of the shadow       : 8.8 km/s
 Elongation to Moon & Sun  : 150° (sunlit = 35%), Sun = 115°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#75

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

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