Cora»Occultation

2026-10-26 / TYC 0661-00455-1 / (1055) Tynka

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jorge JUAN, Carles Schnabel	O+	VID	M410	ES	GPS	23:35:10	23:38:02.12	23:38:02.75	23:40:14	0.040	0.040	0.63	4.9
2	show	Peter Nosal, Paula Libic	O+	VID	M200	SK	NTP	23:33:45	23:34:47.890	23:34:49.31	23:35:43	0.030	0.030	1.42	10.9
3	show	Marek Harman	O+	VID	?350	SK	NTP	23:32:45	23:34:45.892	23:34:46.819	23:36:45	0.005	0.005	0.93	7.2

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):

JPL72 : 49e35820-d9b5-11f1-43f3-6c51d976ef81 [db: observed]

Using prediction 49e35820-d9b5-11f1-43f3-6c51d976ef81 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 12 km

From 3 chords (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] : 49e35820-d9b5-11f1-43f3-6c51d976ef81 [observed] Occultation Date + Time : 2026-10-26 at 23:36:34 UT +/- 0.01 min [1] Object Designation : (1055) Tynka Orbit Class : MBA Star Designation : GDR3 3302793502318883584 Star Coordinates (ICRF) : RA = 03 50 28.3729, DE = +10 16 29.755 [2] Star Magnitudes : G = 10.86 mag, RP = 10.51 mag, BP = 11.07 mag Object Magnitude : V = 14.56 mag Estimated Magnitude Drop : 3.7 mag Estimated Max. Duration : 1.7 sec Object Mean Diameter : 13.5 km (src: astorb) Speed of the shadow : 7.7 km/s Elongation to Moon & Sun : 20° (sunlit = 99%), Sun = 154° Cross-track uncertainty : 0.7 mas = 0 km = 0.04 path-width (1-sig) RUWE and duplicate source : 1.44 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL72 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 49e35820-d9b5-11f1-43f3-6c51d976ef81 [observed]

 Occultation Date + Time   : 2026-10-26 at 23:36:34 UT +/- 0.01 min  [1]
 Object Designation        : (1055) Tynka
 Orbit Class               : MBA
 Star Designation          : GDR3 3302793502318883584
 Star Coordinates (ICRF)   : RA = 03 50 28.3729, DE = +10 16 29.755  [2]
 Star Magnitudes           : G = 10.86 mag, RP = 10.51 mag, BP = 11.07 mag
 Object Magnitude          : V = 14.56 mag
 Estimated Magnitude Drop  : 3.7 mag
 Estimated Max. Duration   : 1.7 sec
 Object Mean Diameter      : 13.5 km  (src: astorb)
 Speed of the shadow       : 7.7 km/s
 Elongation to Moon & Sun  : 20° (sunlit = 99%), Sun = 154°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.44 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL72
 Note                      : FP:true

 
 [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)