Cora»Occultation

2006-10-08 / TYC 1722-00810-1 / (409) Aspasia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	G. Busi/C. Frisoni	O+	VID	M400	IT	RAD++	21:24:00	21:24:54.52	21:25:00.28	21:30:00	0.24	0.24	5.76	69.7
2	show	Roberto Di Luca	O+	VID	M250	IT	RAD++	21:20:00	21:24:48.92	21:25:00.84	21:30:00	0.04	0.04	11.92	144.2
3	show	Paolo Corelli	O+	CCD	M450	IT	NTP	21:24:15	21:24:32.80	21:24:41.95	21:25:15	0.3	0.3	9.15	110.7
4	show	Bernd Gaehrken	O+	VID	L120	AT	RAD	21:24:20	21:24:21.40	21:24:36.12	21:28:00			14.72	178.1
5	show	Michael Schmid	O+	VID	L300	AT	RAD	21:20:00	21:24:07.88	21:24:14.84	21:25:10	0.15	0.10	6.96	84.2
6	show	Gerhard Dangl	O+	VID	M254	AT	GPS++	21:20:50	21:24:06.10	21:24:20.94	21:27:41	0.01	0.01	14.84	179.6
7	show	Ladislav Smelcer	O+	CCD	M280	CZ	RAD		21:23:52.8	21:24:01.5		1.0	1.0	8.70	105.3
8	show	E. Frappa/A. Klotz	O-	CCD	M250	FR		21:24:28			21:27:35
9	show	Andrea Manna	O-	VIS	M300	CH		21:18:00			21:40:00
10	show	Stefano Sposetti	O-	CCD	M400	CH		21:21:30			21:28:30
11	show	Wieslaw Slotwinski	O-	VIS	M200	PL		21:18:00			21:30:00
12	show	Libor Smid	O-	VID	M355	CZ		21:21:00			21:26:00
13	show	Otta Sandor	O-	VIS	M200	CZ		21:21:02			21:29:22
14	show	Tomas Janik	O-	VIS	M200	CZ		21:23:32			21:24:31
15	show	Jerzy Speil	O-	VIS	M250	PL		21:21:30			21:26:30

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

15 observations found in db: euraster

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

JPL#124 : ff9ef757-db82-402d-bd94-a792ae0c509f [db: observed]

Using prediction ff9ef757-db82-402d-bd94-a792ae0c509f 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 = 183 x 167 km
a',b' = 91.7, 83.3 km
X0,Y0 = 1871.1, 26.0 km
Mean diameter = 175 km

From 7 chords (VID,CCD)

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: 2006-10-08, 21:23 UT (JD = 2454017.391)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 215	None	9.021	3°, 30°	2.44431e6	9707.4	0.0°	None	2011-04-11	173.0 +/- 17.0 km	2011-03-28
# 715	4.0	9.021	4°, 29°	2.44431e6	9707.4	0.0°	None	2017-06-19	164.0 +/- 3.0 km	2017-06-19

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] : ff9ef757-db82-402d-bd94-a792ae0c509f [observed] Occultation Date + Time : 2006-10-08 at 21:26:56 UT +/- 0.02 min [1] Object Designation : (409) Aspasia Orbit Class : MBA Star Designation : GDR3 2770755012641480448 Star Coordinates (ICRF) : RA = 23 55 16.8632, DE = +15 03 50.495 [2] Star Magnitudes : G = 10.49 mag, RP = 9.97 mag, BP = 10.84 mag Object Magnitude : V = 11.45 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 13.4 sec Object Mean Diameter : 162 km (src: astorb) Speed of the shadow : 12.1 km/s Elongation to Moon & Sun : 36° (sunlit = 95%), Sun = 162° Cross-track uncertainty : 2.7 mas = 3 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.13 mas, dup.src = 1 (0:false, 1:true) Ephemeris Reference : JPL#124 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] : ff9ef757-db82-402d-bd94-a792ae0c509f [observed]

 Occultation Date + Time   : 2006-10-08 at 21:26:56 UT +/- 0.02 min  [1]
 Object Designation        : (409) Aspasia
 Orbit Class               : MBA
 Star Designation          : GDR3 2770755012641480448
 Star Coordinates (ICRF)   : RA = 23 55 16.8632, DE = +15 03 50.495  [2]
 Star Magnitudes           : G = 10.49 mag, RP = 9.97 mag, BP = 10.84 mag
 Object Magnitude          : V = 11.45 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 13.4 sec
 Object Mean Diameter      : 162 km  (src: astorb)
 Speed of the shadow       : 12.1 km/s
 Elongation to Moon & Sun  : 36° (sunlit = 95%), Sun = 162°
 Cross-track uncertainty   : 2.7 mas = 3 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#124

 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)

Collaborative Occultation Resources and Archive (CORA)

2006-10-08 / TYC 1722-00810-1 / (409) Aspasia

Sky projection (artificial light) for occ. time: 2006-10-08, 21:23 UT (JD = 2454017.391)