Cora»Occultation

2023-08-23 / UCAC4 590-030875 / (476) Hedwig

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Oliver Kloes	O+	CCD	M254	DE	GPS	00:56:29	00:57:18.9	00:57:23.4	00:58:29	0.8	0.8	4.50	147.2
2	show	Eberhard Bredner	O+	VID	M250	DE	GPS	00:54:55	00:57:21.500	00:57:23.800	00:58:56	0.6	0.3	2.30	75.2
3	show	Karl-Ludwig Bath	O-	CCD	T180	DE	NTP	00:54:01			01:00:01
4	show	Anna Marciniak	O-	CCD	M350	PL	GPS	00:56:20			00:58:26

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#141 : fb8b9a00-ddb3-11f0-547e-674effb5be5e [db: observed]

JPL#141 : 06d17f10-ddb4-11f0-547e-c9e9fc4e7431 [db: observed]

Using prediction fb8b9a00-ddb3-11f0-547e-674effb5be5e 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 = -350.9, 42.9 km
Circular diameter = 150 km

From 2 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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Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : fb8b9a00-ddb3-11f0-547e-674effb5be5e [observed] Occultation Date + Time : 2023-08-23 at 00:59:34 UT +/- 0.0 min [1] Object Designation : (476) Hedwig Orbit Class : MBA Star Designation : GDR3 3433464579467239424 Star Coordinates (ICRF) : RA = 06 22 05.4395, DE = +27 50 23.765 [2] Star Magnitudes : G = 13.77 mag, RP = 13.42 mag, BP = 13.98 mag Object Magnitude : V = 14.4 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 3.6 sec Object Mean Diameter : 116.8 km (src: astorb) Speed of the shadow : 32.7 km/s Elongation to Moon & Sun : 128° (sunlit = 36%), Sun = 55° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#141 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : fb8b9a00-ddb3-11f0-547e-674effb5be5e [observed] Occultation Date + Time : 2023-08-23 at 00:59:34 UT +/- 0.0 min [1] Object Designation : (476) Hedwig Orbit Class : MBA Star Designation : GDR3 3433464579467239424 Star Coordinates (ICRF) : RA = 06 22 05.4395, DE = +27 50 23.765 [2] Star Magnitudes : G = 13.77 mag, RP = 13.42 mag, BP = 13.98 mag Object Magnitude : V = 14.4 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 3.6 sec Object Mean Diameter : 116.8 km (src: astorb) Speed of the shadow : 32.7 km/s Elongation to Moon & Sun : 128° (sunlit = 36%), Sun = 55° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#141 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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