Cora»Occultation

2026-10-12 / UCAC4 465-133126 / (225) Henrietta

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michael Kohl	O+	VID	M200	CH	GPS	23:45:28	23:47:23.450	23:47:32.700	23:49:30	0.150	0.300	9.25	98.0
2	show	Andreas Schweizer	O+	VID	M250	CH	GPS	23:46:57	23:47:23.156	23:47:30.756	23:47:57	0.170	0.170	7.60	80.6
3	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	23:46:09	23:47:07.750	23:47:13.230	23:48:10	0.190	0.110	5.48	58.1

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

3 observations found in db: sodis

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

JPL144 : 961814d0-d9b3-11f1-43f3-854eddfde7af [db: observed]

Using prediction 961814d0-d9b3-11f1-43f3-854eddfde7af 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 = 110 x 93 km
a',b' = 55.2, 46.4 km
X0,Y0 = -4604.5, 27.2 km
Mean diameter = 101 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.

Sky projection (artificial light) for occ. time: 2026-10-12, 23:47 UT (JD = 2461326.491)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 4859	1.0	7.356	184°, 54°	2.457278e6	4048.5	0.0°	None	2020-10-05	not scaled	2019-10-23

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] : 961814d0-d9b3-11f1-43f3-854eddfde7af [observed] Occultation Date + Time : 2026-10-12 at 23:52:43 UT +/- 0.06 min [1] Object Designation : (225) Henrietta Orbit Class : MBA Star Designation : GDR3 2695466022647579520 Star Coordinates (ICRF) : RA = 21 57 36.3755, DE = +02 59 49.296 [2] Star Magnitudes : G = 14.1 mag, RP = 13.59 mag, BP = 14.45 mag Object Magnitude : V = 13.19 mag Estimated Magnitude Drop : 0.4 mag Estimated Max. Duration : 11.3 sec Object Mean Diameter : 120.5 km (src: astorb) Speed of the shadow : 10.6 km/s Elongation to Moon & Sun : 106° (sunlit = 6%), Sun = 131° Cross-track uncertainty : 1.0 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.02 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL144 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 961814d0-d9b3-11f1-43f3-854eddfde7af [observed]

 Occultation Date + Time   : 2026-10-12 at 23:52:43 UT +/- 0.06 min  [1]
 Object Designation        : (225) Henrietta
 Orbit Class               : MBA
 Star Designation          : GDR3 2695466022647579520
 Star Coordinates (ICRF)   : RA = 21 57 36.3755, DE = +02 59 49.296  [2]
 Star Magnitudes           : G = 14.1 mag, RP = 13.59 mag, BP = 14.45 mag
 Object Magnitude          : V = 13.19 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 11.3 sec
 Object Mean Diameter      : 120.5 km  (src: astorb)
 Speed of the shadow       : 10.6 km/s
 Elongation to Moon & Sun  : 106° (sunlit = 6%), Sun = 131°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL144
 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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