Collaborative Occultation Resources and Archive (CORA)

2025-02-04 / TYC 1374-00601-1 / (4176) Sudek

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Delincak	O+	VID	M400	SK	NTP	22:31:15	22:32:02.327	22:32:05.497	22:32:48	0.004	0.004	3.17	28.5
2	show	Tomas Janik, Zdenek Moravec	O+	CCD	T600	CZ	GPS	22:32:00	22:32:43.12	22:32:43.69	22:33:30	0.03	0.03	0.57	5.1

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#55 : 9bae8220-89ac-11ef-78cd-bbda5cee59aa [db: asteroids]

Using prediction 9bae8220-89ac-11ef-78cd-bbda5cee59aa 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 = -871.0, 39.9 km
Circular diameter = 54 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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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 9bae8220-89ac-11ef-78cd-bbda5cee59aa [asteroids] Occultation Date + Time : 2025-02-04 at 22:32:30 UT +/- 0.0 min [1] Object Designation : (4176) Sudek Orbit Class : MBA Star Designation : GDR3 0674534788615498112 Star Coordinates (ICRF) : RA = 07 47 04.2577, DE = +21 44 39.446 [2] Star Magnitudes : G = 10.3 mag, RP = 9.62 mag, BP = 10.83 mag Object Magnitude : V = 16.02 mag Estimated Magnitude Drop : 5.7 mag Estimated Max. Duration : 3.3 sec Object Mean Diameter : 30.0 km (src: astorb) Speed of the shadow : 9.0 km/s Elongation to Moon & Sun : 74° (sunlit = 46%), Sun = 158° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.84 mas, dup.src = 1 (0:false, 1:true) Ephemeris Reference : JPL#55 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 9bae8220-89ac-11ef-78cd-bbda5cee59aa [asteroids]

 Occultation Date + Time   : 2025-02-04 at 22:32:30 UT +/- 0.0 min  [1]
 Object Designation        : (4176) Sudek
 Orbit Class               : MBA
 Star Designation          : GDR3 0674534788615498112
 Star Coordinates (ICRF)   : RA = 07 47 04.2577, DE = +21 44 39.446  [2]
 Star Magnitudes           : G = 10.3 mag, RP = 9.62 mag, BP = 10.83 mag
 Object Magnitude          : V = 16.02 mag
 Estimated Magnitude Drop  : 5.7 mag
 Estimated Max. Duration   : 3.3 sec
 Object Mean Diameter      : 30.0 km  (src: astorb)
 Speed of the shadow       : 9.0 km/s
 Elongation to Moon & Sun  : 74° (sunlit = 46%), Sun = 158°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.84 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#55

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

More Data and Informations

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