Cora»Occultation

2025-08-23 / UCAC4 307-247667 / (5463) Danwelcher

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jordi Marco	O+	CCD	M235	ES	NTP	22:21:36	22:23:13.68	22:23:15.23	22:24:38	0.050	0.100	1.55	4.5
2	show	Bernat Garreta	O+	CCD	M200	ES	NTP	22:21:16	22:23:14.27	22:23:15.66	22:25:16	0.110	0.110	1.39	4.0

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#74 : 507c6a50-ddb7-11f0-547e-4eb6f77f0618 [db: observed]

Using prediction 507c6a50-ddb7-11f0-547e-4eb6f77f0618 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 = 1429.9, 11.3 km
Circular diameter = 4 km

From 2 chords (CCD)

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] : 507c6a50-ddb7-11f0-547e-4eb6f77f0618 [observed] Occultation Date + Time : 2025-08-23 at 21:49:47 UT +/- 0.02 min [1] Object Designation : (5463) Danwelcher Orbit Class : MBA Star Designation : GDR3 4071451223651880576 Star Coordinates (ICRF) : RA = 18 48 34.1526, DE = -28 37 51.378 [2] Star Magnitudes : G = 11.84 mag, RP = 11.09 mag, BP = 12.45 mag Object Magnitude : V = 16.39 mag Estimated Magnitude Drop : 4.6 mag Estimated Max. Duration : 2.2 sec Object Mean Diameter : 6.5 km (src: astorb) Speed of the shadow : 2.9 km/s Elongation to Moon & Sun : 122° (sunlit = 0%), Sun = 129° Cross-track uncertainty : 0.3 mas = 0 km = 0.04 path-width (1-sig) RUWE and duplicate source : 0.83 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#74 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 507c6a50-ddb7-11f0-547e-4eb6f77f0618 [observed]

 Occultation Date + Time   : 2025-08-23 at 21:49:47 UT +/- 0.02 min  [1]
 Object Designation        : (5463) Danwelcher
 Orbit Class               : MBA
 Star Designation          : GDR3 4071451223651880576
 Star Coordinates (ICRF)   : RA = 18 48 34.1526, DE = -28 37 51.378  [2]
 Star Magnitudes           : G = 11.84 mag, RP = 11.09 mag, BP = 12.45 mag
 Object Magnitude          : V = 16.39 mag
 Estimated Magnitude Drop  : 4.6 mag
 Estimated Max. Duration   : 2.2 sec
 Object Mean Diameter      : 6.5 km  (src: astorb)
 Speed of the shadow       : 2.9 km/s
 Elongation to Moon & Sun  : 122° (sunlit = 0%), Sun = 129°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.83 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#74
 Note                      : FP:true

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

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