Cora»Occultation

2023-03-29 / UCAC4 356-101458 / (206) Hersilia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Nosal	O+	VID	M250	SK	NTP	03:27:02	03:29:39.7	03:29:51.1	03:30:35	0.8	0.8	11.40	109.4
2	show	Daniel Blazewicz	O+	CCD	M350	PL	NTP	03:26:38	03:29:53.2	03:29:58.6	03:33:06	0.5	0.5	5.40	51.8
3	show	Marcin Filipek	O-	VID	M250	PL	NTP	03:29:04			03:30:33

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 : 7f4bbd80-ddb3-11f0-547e-2cbd15b7875a [db: observed]

Using prediction 7f4bbd80-ddb3-11f0-547e-2cbd15b7875a 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:
X0,Y0 = 710.6, 16.3 km
Circular diameter = 106 km

From 2 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.

Sky projection (artificial light) for occ. time: 2023-03-29, 03:29 UT (JD = 2460032.645)

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	8945.6	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] : 7f4bbd80-ddb3-11f0-547e-2cbd15b7875a [observed] Occultation Date + Time : 2023-03-29 at 03:29:13 UT +/- 0.01 min [1] Object Designation : (206) Hersilia Orbit Class : MBA Star Designation : GDR3 4121823420404015488 Star Coordinates (ICRF) : RA = 17 34 05.6042, DE = -18 56 00.592 [2] Star Magnitudes : G = 14.85 mag, RP = 13.91 mag, BP = 15.73 mag Object Magnitude : V = 14.11 mag Estimated Magnitude Drop : 0.5 mag Estimated Max. Duration : 5.9 sec Object Mean Diameter : 56.2 km (src: astorb) Speed of the shadow : 9.6 km/s Elongation to Moon & Sun : 163° (sunlit = 51%), Sun = 104° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.93 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] : 7f4bbd80-ddb3-11f0-547e-2cbd15b7875a [observed]

 Occultation Date + Time   : 2023-03-29 at 03:29:13 UT +/- 0.01 min  [1]
 Object Designation        : (206) Hersilia
 Orbit Class               : MBA
 Star Designation          : GDR3 4121823420404015488
 Star Coordinates (ICRF)   : RA = 17 34 05.6042, DE = -18 56 00.592  [2]
 Star Magnitudes           : G = 14.85 mag, RP = 13.91 mag, BP = 15.73 mag
 Object Magnitude          : V = 14.11 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 5.9 sec
 Object Mean Diameter      : 56.2 km  (src: astorb)
 Speed of the shadow       : 9.6 km/s
 Elongation to Moon & Sun  : 163° (sunlit = 51%), Sun = 104°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.93 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

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

Aladin Lite direct link (has Gaia overlay)