Cora»Occultation

2025-04-21 / TYC 1911-00434-1 / (77) Frigga

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jordi Marco	O+	CCD	M235	ES	NTP	19:34:30	19:35:59.644	19:36:02.197	19:37:28	0.017	0.017	2.55	58.9
2	show	Joan Aragones	O+	CCD	M250	ES	NTP	19:34:30	19:35:59.47	19:36:02.08	19:37:52	0.1	0.1	2.61	60.3
3	show	Jorge JUAN, Carles Schnabel	O+	VID	M410	ES	GPS	19:34:28	19:35:58.15	19:36:00.67	19:37:31	0.04	0.04	2.52	58.2

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL#118 : 8197f010-ddb6-11f0-547e-0bc1ffeda324 [db: observed]

Using prediction 8197f010-ddb6-11f0-547e-0bc1ffeda324 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:
Size = 65 x 3 km
a',b' = 32.5, 1.7 km
X0,Y0 = -587.3, 0.3 km
Mean diameter = 15 km

From 3 chords (VID,CCD)

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Event Details
Occultation UUID [and DB] : 8197f010-ddb6-11f0-547e-0bc1ffeda324 [observed] Occultation Date + Time : 2025-04-21 at 19:34:33 UT +/- 0.0 min [1] Object Designation : (77) Frigga Orbit Class : MBA Star Designation : GDR3 0868070344301213184 Star Coordinates (ICRF) : RA = 07 35 26.7739, DE = +23 25 02.730 [2] Star Magnitudes : G = 10.0 mag, RP = 9.3 mag, BP = 10.54 mag Object Magnitude : V = 13.66 mag Estimated Magnitude Drop : 3.7 mag Estimated Max. Duration : 3.0 sec Object Mean Diameter : 69.2 km (src: astorb) Speed of the shadow : 23.1 km/s Elongation to Moon & Sun : 161° (sunlit = 42%), Sun = 80° Cross-track uncertainty : 0.7 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.85 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#118 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 8197f010-ddb6-11f0-547e-0bc1ffeda324 [observed]

 Occultation Date + Time   : 2025-04-21 at 19:34:33 UT +/- 0.0 min  [1]
 Object Designation        : (77) Frigga
 Orbit Class               : MBA
 Star Designation          : GDR3 0868070344301213184
 Star Coordinates (ICRF)   : RA = 07 35 26.7739, DE = +23 25 02.730  [2]
 Star Magnitudes           : G = 10.0 mag, RP = 9.3 mag, BP = 10.54 mag
 Object Magnitude          : V = 13.66 mag
 Estimated Magnitude Drop  : 3.7 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 69.2 km  (src: astorb)
 Speed of the shadow       : 23.1 km/s
 Elongation to Moon & Sun  : 161° (sunlit = 42%), Sun = 80°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.85 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#118
 Note                      : FP:true

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

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