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2024-12-10 / TYC 2426-00530-1 / (120) Lachesis

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Rui Goncalves O+ VID M256 PT GPS 23:28:36 23:29:35.40 23:29:47.89 23:31:01 0.10 0.06 12.49 154.9
2 show Oscar Canales O+ CCD M200 ES GPS 23:27:26 23:28:51.29 23:28:57.68 23:30:26 0.12 0.12 6.39 79.2
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#152 : 410165b0-853b-11ef-78cd-a81ffff7205a [db: asteroids]
JPL#152 : f93c8d10-8259-11ef-6618-6a7effbfa894 [db: asteroids]

Using prediction 410165b0-853b-11ef-78cd-a81ffff7205a 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 = -82.8, 11.8 km
Circular diameter = 176 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: 2024-12-10, 23:29 UT (JD = 2460655.478)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 943None46.551 256°, 39° 2.445042e615613.50.0° NoneNone not scaled 2016-01-04
# 944None46.550 82°, 55° 2.445042e615613.50.0° 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] : 410165b0-853b-11ef-78cd-a81ffff7205a [asteroids]

 Occultation Date + Time   : 2024-12-10 at 23:25:49 UT +/- 0.01 min  [1]
 Object Designation        : (120) Lachesis
 Orbit Class               : MBA
 Star Designation          : GDR3 3436174669471885568
 Star Coordinates (ICRF)   : RA = 06 35 26.8895, DE = +32 21 30.036  [2]
 Star Magnitudes           : G = 12.21 mag, RP = 11.57 mag, BP = 12.7 mag
 Object Magnitude          : V = 12.65 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 14.0 sec
 Object Mean Diameter      : 174 km  (src: astorb)
 Speed of the shadow       : 12.4 km/s
 Elongation to Moon & Sun  : 77° (sunlit = 76%), Sun = 160°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#152

 
 [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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