Cora»Occultation

2024-12-29 / UCAC4 589-021820 / (2509) Chukotka

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carles Schnabel	O+	VID	M400	ES	GPS	02:19:27	02:21:26.25	02:21:27.8	02:23:14	0.16	0.2	1.55	18.8
2	show	Antoni Selva, Carlos Perello	O+	VID	M500	ES	GPS	02:20:26	02:21:25.560	02:21:27.170	02:22:26	0.10	0.10	1.61	19.5

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#67 : 64154c80-ddb2-11f0-547e-2b571feeadfd [db: observed]

JPL#67 : 64157390-ddb2-11f0-547e-5096fbe914e6 [db: observed]

Using prediction 64157390-ddb2-11f0-547e-5096fbe914e6 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 = -5242.8, 7689.1 km
Circular diameter = 22 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).

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 64157390-ddb2-11f0-547e-5096fbe914e6 [observed] Occultation Date + Time : 2024-12-29 at 02:19:06 UT +/- 0.0 min [1] Object Designation : (2509) Chukotka Orbit Class : MBA Star Designation : GDR3 3443030919042501888 Star Coordinates (ICRF) : RA = 05 49 05.9496, DE = +27 44 45.315 [2] Star Magnitudes : G = 12.51 mag, RP = 11.56 mag, BP = 13.42 mag Object Magnitude : V = 16.48 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 0.7 sec Object Mean Diameter : 8.8 km (src: astorb) Speed of the shadow : 12.1 km/s Elongation to Moon & Sun : 168° (sunlit = 4%), Sun = 169° Cross-track uncertainty : 0.3 mas = 0 km = 0.04 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#67 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 64157390-ddb2-11f0-547e-5096fbe914e6 [observed]

 Occultation Date + Time   : 2024-12-29 at 02:19:06 UT +/- 0.0 min  [1]
 Object Designation        : (2509) Chukotka
 Orbit Class               : MBA
 Star Designation          : GDR3 3443030919042501888
 Star Coordinates (ICRF)   : RA = 05 49 05.9496, DE = +27 44 45.315  [2]
 Star Magnitudes           : G = 12.51 mag, RP = 11.56 mag, BP = 13.42 mag
 Object Magnitude          : V = 16.48 mag
 Estimated Magnitude Drop  : 4.0 mag
 Estimated Max. Duration   : 0.7 sec
 Object Mean Diameter      : 8.8 km  (src: astorb)
 Speed of the shadow       : 12.1 km/s
 Elongation to Moon & Sun  : 168° (sunlit = 4%), Sun = 169°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#67
 Note                      : FP:true

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

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