Cora»Occultation

2025-12-29 / UCAC4 659-045701 / (46915) 1998 RK75

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Anna Marciniak	O+	CCD	M400	PL	GPS	21:53:00	21:53:28.52	21:53:28.97	21:54:00	0.040	0.040	0.45	5.0
2	show	Daniel Antuszewicz	O+	VID	M300	PL	NTP	21:52:09	21:53:05.99	21:53:06.49	21:54:09	0.030	0.020	0.50	5.5

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):

JPL64 : e8c39690-d996-11f1-43f3-fab633d7f8fa [db: observed]

Using prediction e8c39690-d996-11f1-43f3-fab633d7f8fa 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 = -161.0, 22.8 km
Circular diameter = 6 km

From 2 chords (CCD,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).

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Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : e8c39690-d996-11f1-43f3-fab633d7f8fa [observed] Occultation Date + Time : 2025-12-29 at 21:51:27 UT +/- 0.0 min [1] Object Designation : (46915) 1998 RK75 Orbit Class : MBA Star Designation : GDR3 0951742904296548736 Star Coordinates (ICRF) : RA = 06 45 58.7037, DE = +41 36 18.934 [2] Star Magnitudes : G = 12.22 mag, RP = 11.56 mag, BP = 12.7 mag Object Magnitude : V = 16.88 mag Estimated Magnitude Drop : 4.7 mag Estimated Max. Duration : 0.7 sec Object Mean Diameter : 7.3 km (src: astorb) Speed of the shadow : 11.1 km/s Elongation to Moon & Sun : 63° (sunlit = 73%), Sun = 161° Cross-track uncertainty : 0.3 mas = 0 km = 0.05 path-width (1-sig) RUWE and duplicate source : 1.35 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL64 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : e8c39690-d996-11f1-43f3-fab633d7f8fa [observed]

 Occultation Date + Time   : 2025-12-29 at 21:51:27 UT +/- 0.0 min  [1]
 Object Designation        : (46915) 1998 RK75
 Orbit Class               : MBA
 Star Designation          : GDR3 0951742904296548736
 Star Coordinates (ICRF)   : RA = 06 45 58.7037, DE = +41 36 18.934  [2]
 Star Magnitudes           : G = 12.22 mag, RP = 11.56 mag, BP = 12.7 mag
 Object Magnitude          : V = 16.88 mag
 Estimated Magnitude Drop  : 4.7 mag
 Estimated Max. Duration   : 0.7 sec
 Object Mean Diameter      : 7.3 km  (src: astorb)
 Speed of the shadow       : 11.1 km/s
 Elongation to Moon & Sun  : 63° (sunlit = 73%), Sun = 161°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.35 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL64
 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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