Cora»Occultation

2024-10-20 / J043253.83+434946.1 / (930) Westphalia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Vladimir Belousov	O+	DRS	L125	RU	GPS	00:26:00	00:26:10.590	00:26:13.160	00:26:32	0.08	0.08	2.57	20.3
2	show	Michele Turchenko	O+	VID	M150	RU	GPS	00:26:30	00:27:30.610	00:27:32.170	00:28:39	0.05	0.09	1.56	12.3
3	show	Anton Zhdanov	O-	VID	M200	RU	GPS	00:26:07			00:29:01

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL#86 : 9713ed50-ddb5-11f0-547e-756bf9fd7fa9 [db: observed]

JPL#86 : 9713ed50-ddb5-11f0-547e-e28076fbaaaa [db: observed]

Using prediction 9713ed50-ddb5-11f0-547e-e28076fbaaaa 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 = -576.6, 589.0 km
Circular diameter = 23 km

From 2 chords (VID,DRS)

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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Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 9713ed50-ddb5-11f0-547e-e28076fbaaaa [observed] Occultation Date + Time : 2024-10-20 at 00:25:19 UT +/- 0.02 min [1] Object Designation : (930) Westphalia Orbit Class : MBA Star Designation : GDR3 0252648053872412800 Star Coordinates (ICRF) : RA = 04 32 53.8577, DE = +43 49 46.447 [2] Star Magnitudes : G = 12.84 mag, RP = 11.58 mag, BP = 12.53 mag Object Magnitude : V = 15.41 mag Estimated Magnitude Drop : 2.7 mag Estimated Max. Duration : 4.6 sec Object Mean Diameter : 36.5 km (src: astorb) Speed of the shadow : 7.9 km/s Elongation to Moon & Sun : 20° (sunlit = 91%), Sun = 130° Cross-track uncertainty : 3.7 mas = 4 km = 0.13 path-width (1-sig) RUWE and duplicate source : 28.51 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#86 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 9713ed50-ddb5-11f0-547e-e28076fbaaaa [observed] Occultation Date + Time : 2024-10-20 at 00:25:19 UT +/- 0.02 min [1] Object Designation : (930) Westphalia Orbit Class : MBA Star Designation : GDR3 0252648053872412800 Star Coordinates (ICRF) : RA = 04 32 53.8577, DE = +43 49 46.447 [2] Star Magnitudes : G = 12.84 mag, RP = 11.58 mag, BP = 12.53 mag Object Magnitude : V = 15.41 mag Estimated Magnitude Drop : 2.7 mag Estimated Max. Duration : 4.6 sec Object Mean Diameter : 36.5 km (src: astorb) Speed of the shadow : 7.9 km/s Elongation to Moon & Sun : 20° (sunlit = 91%), Sun = 130° Cross-track uncertainty : 3.7 mas = 4 km = 0.13 path-width (1-sig) RUWE and duplicate source : 28.51 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#86 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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