Cora»Occultation

2026-01-12 / UCAC4 546-033707 / (206) Hersilia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	VID	M250	ES	GPS	20:37:02	20:37:59.576	20:38:04.775	20:39:02	0.043	0.043	5.20	57.7
2	show	Deborah Smith	O+	VID	M250	ES	GPS	20:37:02	20:38:05.741	20:38:07.841	20:39:02	0.036	0.036	2.10	23.3
3	show	Deborah Smith	O-	VID	M300	ES	GPS	20:37:09	::	::	20:39:09

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#139 : dd3ffab0-de6b-11f0-4858-b88157bb3844 [db: asteroids]

Using prediction dd3ffab0-de6b-11f0-4858-b88157bb3844 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:
Circular profile fit was not successful ...

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.

Sky projection (artificial light) for occ. time: 2026-01-12, 20:37 UT (JD = 2461053.359)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3217	1.0	11.111	250°, 43°	2.451087e6	9966.4	0.0°	None	2019-09-26	not scaled	2019-05-07

Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : dd3ffab0-de6b-11f0-4858-b88157bb3844 [asteroids] Occultation Date + Time : 2026-01-12 at 20:32:14 UT +/- 0.01 min [1] Object Designation : (206) Hersilia Orbit Class : MBA Star Designation : GDR3 3365619562371972608 Star Coordinates (ICRF) : RA = 06 46 42.2012, DE = +19 09 39.031 [2] Star Magnitudes : G = 13.05 mag, RP = 12.3 mag, BP = 13.68 mag Object Magnitude : V = 12.52 mag Estimated Magnitude Drop : 0.5 mag Estimated Max. Duration : 5.0 sec Object Mean Diameter : 56.2 km (src: astorb) Speed of the shadow : 11.1 km/s Elongation to Moon & Sun : 125° (sunlit = 30%), Sun = 168° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.91 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#139 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] : dd3ffab0-de6b-11f0-4858-b88157bb3844 [asteroids]

 Occultation Date + Time   : 2026-01-12 at 20:32:14 UT +/- 0.01 min  [1]
 Object Designation        : (206) Hersilia
 Orbit Class               : MBA
 Star Designation          : GDR3 3365619562371972608
 Star Coordinates (ICRF)   : RA = 06 46 42.2012, DE = +19 09 39.031  [2]
 Star Magnitudes           : G = 13.05 mag, RP = 12.3 mag, BP = 13.68 mag
 Object Magnitude          : V = 12.52 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 5.0 sec
 Object Mean Diameter      : 56.2 km  (src: astorb)
 Speed of the shadow       : 11.1 km/s
 Elongation to Moon & Sun  : 125° (sunlit = 30%), Sun = 168°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.91 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#139
 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

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