Cora»Occultation

2025-09-03 / UCAC4 445-000369 / (2505) Hebei

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith, Eric Smith	O+	VID	M150	ES	GPS	00:48:18	00:50:17.706	00:50:20.460	00:52:18	0.023	0.023	2.75	29.7
2	show	Deborah Smith	O+	VID	M300	ES	GPS	00:48:18	00:50:18.297	00:50:19.139	00:52:18	0.014	0.014	0.84	9.1
3	show	Deborah Smith	O-	VID	M200	ES	GPS	00:48:20	::	::	00:52:20

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#75 : 07fa8b30-ddb3-11f0-547e-40b5dff90a0f [db: observed]

JPL#75 : 5f876db0-ddb7-11f0-547e-51f0b7fbe0b8 [db: observed]

Using prediction 5f876db0-ddb7-11f0-547e-51f0b7fbe0b8 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 = 1599.9, 26.0 km
Circular diameter = 32 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.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 5f876db0-ddb7-11f0-547e-51f0b7fbe0b8 [observed] Occultation Date + Time : 2025-09-03 at 00:51:15 UT +/- 0.0 min [1] Object Designation : (2505) Hebei Orbit Class : MBA Star Designation : GDR3 2545105677245688192 Star Coordinates (ICRF) : RA = 00 17 39.3179, DE = -01 01 19.798 [2] Star Magnitudes : G = 12.98 mag, RP = 12.49 mag, BP = 13.3 mag Object Magnitude : V = 16.29 mag Estimated Magnitude Drop : 3.4 mag Estimated Max. Duration : 1.4 sec Object Mean Diameter : 15.5 km (src: astorb) Speed of the shadow : 10.8 km/s Elongation to Moon & Sun : 81° (sunlit = 76%), Sun = 157° Cross-track uncertainty : 0.7 mas = 1 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.94 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#75 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 5f876db0-ddb7-11f0-547e-51f0b7fbe0b8 [observed] Occultation Date + Time : 2025-09-03 at 00:51:15 UT +/- 0.0 min [1] Object Designation : (2505) Hebei Orbit Class : MBA Star Designation : GDR3 2545105677245688192 Star Coordinates (ICRF) : RA = 00 17 39.3179, DE = -01 01 19.798 [2] Star Magnitudes : G = 12.98 mag, RP = 12.49 mag, BP = 13.3 mag Object Magnitude : V = 16.29 mag Estimated Magnitude Drop : 3.4 mag Estimated Max. Duration : 1.4 sec Object Mean Diameter : 15.5 km (src: astorb) Speed of the shadow : 10.8 km/s Elongation to Moon & Sun : 81° (sunlit = 76%), Sun = 157° Cross-track uncertainty : 0.7 mas = 1 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.94 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#75 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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