Cora»Occultation

2025-04-07 / UCAC4 533-042776 / (79) Eurynome

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Andreas Schweizer	O+	VID	M250	CH	GPS	23:16:08	23:16:36.287	23:16:41.087	23:17:08	0.360	0.360	4.80	76.8
2	show	Arnaud Leroy	O+	VID	M300	FR	GPS	23:14:54	23:16:22.18	23:16:26.88	23:17:54	0.15	0.15	4.70	75.2

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#146 : 68f1aa60-ddb6-11f0-547e-8087bcfbeb5e [db: observed]

Using prediction 68f1aa60-ddb6-11f0-547e-8087bcfbeb5e 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 = -60.7, 59.9 km
Circular diameter = 104 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: 2025-04-07, 23:15 UT (JD = 2460773.469)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 496	None	5.978	54°, 24°	2.442337e6	18436.5	0.0°	None	None	not scaled	2013-02-11
# 497	None	5.978	228°, 30°	2.442337e6	18436.5	0.0°	None	None	not scaled	2013-02-11

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] : 68f1aa60-ddb6-11f0-547e-8087bcfbeb5e [observed] Occultation Date + Time : 2025-04-07 at 23:12:17 UT +/- 0.0 min [1] Object Designation : (79) Eurynome Orbit Class : MBA Star Designation : GDR3 3169003999736936320 Star Coordinates (ICRF) : RA = 07 37 37.7283, DE = +16 32 08.790 [2] Star Magnitudes : G = 13.42 mag, RP = 13.27 mag, BP = 13.51 mag Object Magnitude : V = 12.21 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 4.2 sec Object Mean Diameter : 66.5 km (src: astorb) Speed of the shadow : 16.0 km/s Elongation to Moon & Sun : 30° (sunlit = 78%), Sun = 95° Cross-track uncertainty : 0.7 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.08 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#146 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 68f1aa60-ddb6-11f0-547e-8087bcfbeb5e [observed]

 Occultation Date + Time   : 2025-04-07 at 23:12:17 UT +/- 0.0 min  [1]
 Object Designation        : (79) Eurynome
 Orbit Class               : MBA
 Star Designation          : GDR3 3169003999736936320
 Star Coordinates (ICRF)   : RA = 07 37 37.7283, DE = +16 32 08.790  [2]
 Star Magnitudes           : G = 13.42 mag, RP = 13.27 mag, BP = 13.51 mag
 Object Magnitude          : V = 12.21 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 4.2 sec
 Object Mean Diameter      : 66.5 km  (src: astorb)
 Speed of the shadow       : 16.0 km/s
 Elongation to Moon & Sun  : 30° (sunlit = 78%), Sun = 95°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.08 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#146
 Note                      : FP:true

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

More Data and Informations

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