Cora»Occultation

2025-04-05 / UCAC4 674-047631 / (247) Eukrate

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Björn Kattentidt	O+	VID	M280	DE	GPS	19:54:49	19:56:13.466	19:56:15.986	19:56:51	0.362	0.362	2.52	65.5
2	show	Jiri Polak	O+	VID	M303	CZ	GPS	19:54:42	19:56:10.34	19:56:15.9	19:57:43	0.14	0.4	5.56	144.6

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#120 : 635e0da0-ddb6-11f0-547e-17143d0d693e [db: observed]

Using prediction 635e0da0-ddb6-11f0-547e-17143d0d693e 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 = -1502.4, 26.4 km
Circular diameter = 154 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.

Sky projection (artificial light) for occ. time: 2025-04-05, 19:56 UT (JD = 2460771.331)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 1207	None	12.095	103°, -22°	2.44375e6	17021.3	0.0°	None	None	not scaled	2016-01-04

Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 635e0da0-ddb6-11f0-547e-17143d0d693e [observed] Occultation Date + Time : 2025-04-05 at 19:55:10 UT +/- 0.0 min [1] Object Designation : (247) Eukrate Orbit Class : MBA Star Designation : GDR3 0953945290510408704 Star Coordinates (ICRF) : RA = 06 52 00.3491, DE = +44 38 50.749 [2] Star Magnitudes : G = 14.5 mag, RP = 13.83 mag, BP = 15.02 mag Object Magnitude : V = 12.93 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 5.2 sec Object Mean Diameter : 134.4 km (src: astorb) Speed of the shadow : 26.0 km/s Elongation to Moon & Sun : 23° (sunlit = 58%), Sun = 84° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#120 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 635e0da0-ddb6-11f0-547e-17143d0d693e [observed]

 Occultation Date + Time   : 2025-04-05 at 19:55:10 UT +/- 0.0 min  [1]
 Object Designation        : (247) Eukrate
 Orbit Class               : MBA
 Star Designation          : GDR3 0953945290510408704
 Star Coordinates (ICRF)   : RA = 06 52 00.3491, DE = +44 38 50.749  [2]
 Star Magnitudes           : G = 14.5 mag, RP = 13.83 mag, BP = 15.02 mag
 Object Magnitude          : V = 12.93 mag
 Estimated Magnitude Drop  : 0.2 mag
 Estimated Max. Duration   : 5.2 sec
 Object Mean Diameter      : 134.4 km  (src: astorb)
 Speed of the shadow       : 26.0 km/s
 Elongation to Moon & Sun  : 23° (sunlit = 58%), Sun = 84°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#120
 Note                      : FP:true

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

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