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2024-12-23 / UCAC4 624-016709 / (1284) Latvia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alberto Ossola O+ VID M230 CH GPS 20:37:02 20:38:20.5 20:38:25.6 20:39:24 1 0.6 5.10 42.3
2 show Stefano Sposetti O+ VID M420 CH GPS 20:37:35 20:38:17.356 20:38:21.965 20:39:10 0.342 0.342 4.61 38.3
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#99 : a0f22a00-c35b-11ef-5276-a090b6bbf03b [db: observed]
JPL#97 : beb275c0-86f9-11ef-78cd-9a5bf7fdd46b [db: asteroids]
JPL#97 : 05326850-82f6-11ef-6618-d08affbb88a1 [db: asteroids]

Using prediction 05326850-82f6-11ef-6618-d08affbb88a1 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 = 1207.4, 23.2 km
Circular diameter = 44 km

From 2 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: 2024-12-23, 20:37 UT (JD = 2460668.359)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 45351.09.551 105°, 32° 2.457248e63420.40.0° None2020-10-05 not scaled 2019-10-23
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] : 05326850-82f6-11ef-6618-d08affbb88a1 [asteroids]

 Occultation Date + Time   : 2024-12-23 at 20:38:30 UT +/- 0.01 min  [1]
 Object Designation        : (1284) Latvia
 Orbit Class               : MBA
 Star Designation          : GDR3 0176241410308322048
 Star Coordinates (ICRF)   : RA = 04 26 24.1876, DE = +34 45 55.529  [2]
 Star Magnitudes           : G = 14.29 mag, RP = 13.37 mag, BP = 15.16 mag
 Object Magnitude          : V = 13.18 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 4.4 sec
 Object Mean Diameter      : 37 km  (src: astorb)
 Speed of the shadow       : 8.3 km/s
 Elongation to Moon & Sun  : 121° (sunlit = 41%), Sun = 155°
 Cross-track uncertainty   : 0.8 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.61 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#97

 
 [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
(If error 404: link not valid which means no data available)

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