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2023-11-07 / UCAC4 591-019634 / (210) Isabella

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Marek Zawilski, Mieczyslaw Borkowski O+ VID M200 PL GPS 00:13:46 00:14:23.9 00:14:47.2 00:15:42 0.4 0.3 23.30 111.8
2 show Marek Zawilski, Mieczyslaw Borkowski O+ VID M200 PL GPS 00:13:46 00:14:32.3 00:14:41.5 00:15:42 0.4 0.6 9.20 44.2
3 show Daniel Antuszewicz O- VID M200 PL NTP 00:13:16 00:15:16
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#130 : 721a7d8d-f74f-4cec-8c8e-d777c25dbacb [db: observed]
JPL#135 : ea102fa0-c33f-11ef-5276-a6afbf7fa429 [db: observed]

Using prediction 721a7d8d-f74f-4cec-8c8e-d777c25dbacb 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:
Circular profile fit was not successful ...








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: 2023-11-07, 00:14 UT (JD = 2460255.510)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 987None6.672 278°, -26° 2.450875e69380.50.0° NoneNone not scaled 2016-01-04
# 988None6.672 100°, -14° 2.450875e69380.50.0° 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] : 721a7d8d-f74f-4cec-8c8e-d777c25dbacb [observed]

 Occultation Date + Time   : 2023-11-07 at 00:06:53 UT +/- 0.08 min  [1]
 Object Designation        : (210) Isabella
 Orbit Class               : MBA
 Star Designation          : GDR3 3442359353657524992
 Star Coordinates (ICRF)   : RA = 05 32 32.8644, DE = +28 04 19.551  [2]
 Star Magnitudes           : G = 13.24 mag, RP = 12.51 mag, BP = 13.8 mag
 Object Magnitude          : V = 13.13 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 18.1 sec
 Object Mean Diameter      : 86.7 km  (src: astorb)
 Speed of the shadow       : 4.8 km/s
 Elongation to Moon & Sun  : 68° (sunlit = 35%), Sun = 140°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#130

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

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