Cora»Occultation

2024-08-24 / UCAC4 331-184296 / (931) Whittemora

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	CCD	M203	ES	NTP	22:08:32	22:09:47.373	22:09:54.006	22:11:48	0.104	0.104	6.63	39.8
2	show	Michal Rottenborn	O+	VID	M254	CZ	GPS	22:05:49	22:07:43.4	22:07:52.2	22:09:49	0.2	0.2	8.80	52.8
3	show	Jiri Polak	O+	VID	M300	CZ	GPS	22:05:45	22:07:43.79	22:07:52.6	22:09:45	0.18	0.3	8.81	52.9
4	show	Ferran Casarramona	O-	VID	M200	ES	GPS	22:08:02			22:11:01

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#81 : 46b0db20-ddb5-11f0-547e-5aa67751971e [db: observed]

Using prediction 46b0db20-ddb5-11f0-547e-5aa67751971e 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 = 63 x 33 km
a',b' = 31.4, 16.5 km
X0,Y0 = 1976.0, 15.7 km
Mean diameter = 45 km

From 3 chords (CCD,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] : 46b0db20-ddb5-11f0-547e-5aa67751971e [observed] Occultation Date + Time : 2024-08-24 at 22:21:53 UT +/- 0.01 min [1] Object Designation : (931) Whittemora Orbit Class : MBA Star Designation : GDR3 4075118571639721984 Star Coordinates (ICRF) : RA = 18 52 29.4740, DE = -23 49 18.590 [2] Star Magnitudes : G = 12.63 mag, RP = 11.8 mag, BP = 13.36 mag Object Magnitude : V = 15.09 mag Estimated Magnitude Drop : 2.6 mag Estimated Max. Duration : 7.5 sec Object Mean Diameter : 45.3 km (src: astorb) Speed of the shadow : 6.0 km/s Elongation to Moon & Sun : 121° (sunlit = 66%), Sun = 130° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.11 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#81 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 46b0db20-ddb5-11f0-547e-5aa67751971e [observed]

 Occultation Date + Time   : 2024-08-24 at 22:21:53 UT +/- 0.01 min  [1]
 Object Designation        : (931) Whittemora
 Orbit Class               : MBA
 Star Designation          : GDR3 4075118571639721984
 Star Coordinates (ICRF)   : RA = 18 52 29.4740, DE = -23 49 18.590  [2]
 Star Magnitudes           : G = 12.63 mag, RP = 11.8 mag, BP = 13.36 mag
 Object Magnitude          : V = 15.09 mag
 Estimated Magnitude Drop  : 2.6 mag
 Estimated Max. Duration   : 7.5 sec
 Object Mean Diameter      : 45.3 km  (src: astorb)
 Speed of the shadow       : 6.0 km/s
 Elongation to Moon & Sun  : 121° (sunlit = 66%), Sun = 130°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#81
 Note                      : FP:true

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

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