Cora»Occultation

2026-03-06 / UCAC4 313-081901 / (972) Cohnia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Marek Harman	O+	VID	M350	SK	NTP	02:19:26	02:21:18.180	02:21:24.800	02:23:22	0.050	0.050	6.62	36.4
2	show	Peter Delincak	O+	VID	M400	SK	NTP	02:19:16	02:21:14.521	02:21:20.312	02:22:40	0.040	0.040	5.79	31.8
3	show	Anna Marciniak	O+	CCD	M400	PL	GPS	02:18:59	02:20:59.8	02:21:10.1	02:23:14	0.300	0.400	10.30	56.7

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#71 : ed6da4c0-de6e-11f0-4858-528ff3df177e [db: asteroids]

Using prediction ed6da4c0-de6e-11f0-4858-528ff3df177e 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 = 238 x 9 km
a',b' = 119.1, 4.5 km
X0,Y0 = -2591.4, 0.8 km
Mean diameter = 46 km

From 3 chords (VID,CCD)

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.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : ed6da4c0-de6e-11f0-4858-528ff3df177e [asteroids] Occultation Date + Time : 2026-03-06 at 02:35:59 UT +/- 0.03 min [1] Object Designation : (972) Cohnia Orbit Class : MBA Star Designation : GDR3 6213450812560020480 Star Coordinates (ICRF) : RA = 15 30 44.6273, DE = -27 27 40.435 [2] Star Magnitudes : G = 12.24 mag, RP = 11.41 mag, BP = 12.97 mag Object Magnitude : V = 15.86 mag Estimated Magnitude Drop : 3.7 mag Estimated Max. Duration : 13.7 sec Object Mean Diameter : 75.7 km (src: astorb) Speed of the shadow : 5.5 km/s Elongation to Moon & Sun : 40° (sunlit = 93%), Sun = 108° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.15 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#71 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : ed6da4c0-de6e-11f0-4858-528ff3df177e [asteroids]

 Occultation Date + Time   : 2026-03-06 at 02:35:59 UT +/- 0.03 min  [1]
 Object Designation        : (972) Cohnia
 Orbit Class               : MBA
 Star Designation          : GDR3 6213450812560020480
 Star Coordinates (ICRF)   : RA = 15 30 44.6273, DE = -27 27 40.435  [2]
 Star Magnitudes           : G = 12.24 mag, RP = 11.41 mag, BP = 12.97 mag
 Object Magnitude          : V = 15.86 mag
 Estimated Magnitude Drop  : 3.7 mag
 Estimated Max. Duration   : 13.7 sec
 Object Mean Diameter      : 75.7 km  (src: astorb)
 Speed of the shadow       : 5.5 km/s
 Elongation to Moon & Sun  : 40° (sunlit = 93%), Sun = 108°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.15 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#71
 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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