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2025-02-03 / UCAC4 547-003491 / (109) Felicitas

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alberto Ossola O+ VID M230 CH GPS 20:30:02 20:31:18.48 20:31:20.24 20:32:34 0.08 0.08 1.76 47.9
2 show Andrea Manna O+ VID M200 CH GPS 20:28:47 20:31:17.76 20:31:20.95 20:34:28 0.06 0.06 3.19 86.8
3 show Stefano Sposetti O+ VID M280 CH GPS 20:31:15 20:31:17.77 20:31:21.17 20:34:30 0.10 0.10 3.40 92.5
4 show Stefano Sposetti O+ VID M200 CH GPS 20:26:45 20:31:17.93 20:31:21.31 20:33:30 0.08 0.10 3.38 91.9
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#66 : cc9f12c0-8536-11ef-78cd-0a718e8ba72d [db: asteroids]

Using prediction cc9f12c0-8536-11ef-78cd-0a718e8ba72d 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 = 94 x 62 km
a',b' = 46.9, 30.9 km
X0,Y0 = 748.0, 25.9 km
Mean diameter = 76 km

From 4 chords (VID)








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: 2025-02-03, 20:30 UT (JD = 2460710.354)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 30963.013.191 252°, -49° 2.444586e616124.40.0° None2019-06-25 81.0 +/- None km 2019-06-24
# 30973.013.191 77°, -26° 2.444586e616124.40.0° None2019-06-25 85.0 +/- 6.0 km 2019-06-24
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

Occ by (109) Felicitas on 2025-02-03

Unavailable
300 km

Event Details
 Occultation UUID [and DB] : cc9f12c0-8536-11ef-78cd-0a718e8ba72d [asteroids]

 Occultation Date + Time   : 2025-02-03 at 20:28:17 UT +/- 0.0 min  [1]
 Object Designation        : (109) Felicitas
 Orbit Class               : MBA
 Star Designation          : GDR3 0092305311117391232
 Star Coordinates (ICRF)   : RA = 01 53 05.4082, DE = +19 13 58.087  [2]
 Star Magnitudes           : G = 12.04 mag, RP = 11.53 mag, BP = 12.38 mag
 Object Magnitude          : V = 13.21 mag
 Estimated Magnitude Drop  : 1.5 mag
 Estimated Max. Duration   : 3.3 sec
 Object Mean Diameter      : 89.4 km  (src: astorb)
 Speed of the shadow       : 27.2 km/s
 Elongation to Moon & Sun  : 9° (sunlit = 33%), Sun = 78°
 Cross-track uncertainty   : 3.0 mas = 3 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.24 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#66

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

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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