Cora»Occultation

2026-09-26 / UCAC4 539-040535 / (308) Polyxo

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Arnaud Leroy	O+	VID	M300	FR	GPS	02:37:37	02:38:34.72	02:38:40.19	02:39:37	0.100	0.150	5.47	137.3
2	show	Jiri Polak	O+	VID	M300	CZ	NTP	02:36:55	02:38:54.67	02:38:56.89	02:40:55	0.050	0.040	2.22	55.7
3	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	02:37:56	02:38:55.400	02:38:58.350	02:39:57	0.040	0.020	2.95	74.0
4	show	Oliver Kloes	O+	CCD	M254	DE	GPS	02:36:48	02:38:46.18	02:38:51.1	02:40:48	0.150	0.200	4.92	123.5
5	show	Vaclav Priban	O+	VID	M300	CZ	GPS	02:37:47	02:38:56.85	02:39:02.42	02:39:46	0.240	0.240	5.57	139.8

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

5 observations found in db: sodis

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

JPL132 : dd7ea7a0-d9b1-11f1-43f3-c27ff3f258d2 [db: observed]

Using prediction dd7ea7a0-d9b1-11f1-43f3-c27ff3f258d2 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 = 150 x 117 km
a',b' = 74.9, 58.4 km
X0,Y0 = -665.6, 28.5 km
Mean diameter = 132 km

From 5 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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : dd7ea7a0-d9b1-11f1-43f3-c27ff3f258d2 [observed] Occultation Date + Time : 2026-09-26 at 02:41:38 UT +/- 0.0 min [1] Object Designation : (308) Polyxo Orbit Class : MBA Star Designation : GDR3 3170255995586795648 Star Coordinates (ICRF) : RA = 07 27 23.4855, DE = +17 43 33.180 [2] Star Magnitudes : G = 13.43 mag, RP = 12.99 mag, BP = 13.7 mag Object Magnitude : V = 13.73 mag Estimated Magnitude Drop : 0.9 mag Estimated Max. Duration : 5.6 sec Object Mean Diameter : 140.7 km (src: astorb) Speed of the shadow : 25.1 km/s Elongation to Moon & Sun : 115° (sunlit = 100%), Sun = 72° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.27 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL132 Note : FP:true Object is a Gaia mass determination target ! [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : dd7ea7a0-d9b1-11f1-43f3-c27ff3f258d2 [observed]

 Occultation Date + Time   : 2026-09-26 at 02:41:38 UT +/- 0.0 min  [1]
 Object Designation        : (308) Polyxo
 Orbit Class               : MBA
 Star Designation          : GDR3 3170255995586795648
 Star Coordinates (ICRF)   : RA = 07 27 23.4855, DE = +17 43 33.180  [2]
 Star Magnitudes           : G = 13.43 mag, RP = 12.99 mag, BP = 13.7 mag
 Object Magnitude          : V = 13.73 mag
 Estimated Magnitude Drop  : 0.9 mag
 Estimated Max. Duration   : 5.6 sec
 Object Mean Diameter      : 140.7 km  (src: astorb)
 Speed of the shadow       : 25.1 km/s
 Elongation to Moon & Sun  : 115° (sunlit = 100%), Sun = 72°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.27 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL132
 Note                      : FP:true

 Object is a Gaia mass determination target !

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

More Data and Informations

SiMDA \| 3D Asteroid Catalogue \| Johnston Archive \| Star at CDS (Vizier) \| JPL Small-Body Node \| Minor Planet Center \| Wikipedia

(If error 404: link not valid which means no data available)

Aladin Sky Atlas
Loading sky atlas…
Aladin Lite direct link (has Gaia overlay)