Cora»Occultation

2008-02-12 / TYC 0740-01361-1 / (409) Aspasia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Paolo Corelli	O+	CCD	M450	IT	NTP	19:48:30	19:48:37.6		19:49:03	0.3
2	show	Eberhard Bredner	O+	VID	M200	FR	GPS++	19:50:28	19:50:28.26	19:51:00.58	19:51:01	0.16	0.16	32.32	135.7
3	show	Eric Frappa	O+	VID	M203	FR	GPS++	19:48:02	19:51:03.17	19:51:21.08	19:55:00	0.01	0.01	17.91	75.2
4	show	C. Demeautis et al	O+	VID	M350	FR	NTP	19:47:08	19:50:16.27	19:50:51.77	19:51:05	0.1	0.1	35.50	149.1
5	show	Denis Fiel	O+	CCD	M203	FR	GPS++	19:49:44	19:51:44.88	19:52:12.38	20:04:44	0.03	0.03	27.50	115.5
6	show	A. Leroy/G. Canaud	O+	VID	M355	FR	GPS++	19:33:20	19:51:35.85	19:52:11.17	19:54:20	0.01	0.01	35.32	148.3
7	show	T. Midavaine et al	O+	VID	M254	FR	RAD++	19:49:22	19:51:43.04	19:52:17.56	19:54:44	0.04	0.04	34.52	145.0
8	show	Olivier Dechambre	O+	CCD	M279	FR	GPS++	19:47:00	19:51:47.73	19:52:21.63	19:57:00	0.06	0.06	33.90	142.4
9	show	Bernard Christophe	O+	CCD	M600	FR	GPS++	19:49:59	19:51:50.08	19:52:20.75	19:53:59	0.04	0.04	30.67	128.8
10	show	Philippe Baudouin	O+	CCD	M200	FR	GPS++	19:49:13	19:52:17.73	19:52:52.47	20:02:19	0.31	0.31	34.74	145.9
11	show	Roberto Di Luca	O-	VID	M250	IT		19:45:00			19:55:00
12	show	Simone Bolzoni	O-	VIS	M200	IT		19:47:00			19:54:00
13	show	Stefano Klett	O-	CCD	M356	CH		19:45:37			19:55:39
14	show	Andrea Manna	O-	VIS	M300	CH		19:41:53			19:58:00
15	show	Stefano Sposetti	O-	CCD	M400	CH		19:47:15			19:53:15
16	show	Christian Gros	O-	VIS	M180	FR		19:46:00			19:56:00
17	show	Maurice Audejean	O-	CCD	M320	FR		19:48:03			19:58:03
18	show	Jean Lecacheux	O-	VID	M212	FR		19:44:03			20:00:17
19	show	T. Flatres et al	O-	VID	M200	FR		19:48:30			19:58:00
20	show	Michael Parl	O-	VID	M203	DE		19:45:00			19:55:00
21	show	Jean Denis	O-	VIS	M254	FR		19:45:00			20:00:00
22	show	F. Van Den Abbeel	O-	CCD	M200	BE		19:50:33			19:52:33
23	show	Malcolm Jennings	O-	VID	M305	UK		19:40:00			20:00:00

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

23 observations found in db: euraster

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

JPL#124 : b0b91cd9-d65d-4be3-869c-4a47d47de19a [db: observed]

JPL#124 : c6ee4d94-96be-4c5f-9945-c7446a692d9a [db: observed]

Using prediction b0b91cd9-d65d-4be3-869c-4a47d47de19a 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 = 158 x 141 km
a',b' = 79.0, 70.6 km
X0,Y0 = -1144.0, 8.5 km
Mean diameter = 149 km

From 9 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: 2008-02-12, 19:48 UT (JD = 2454509.325)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 215	None	9.021	3°, 30°	2.44431e6	10199.3	0.0°	None	2011-04-11	173.0 +/- 17.0 km	2011-03-28
# 715	4.0	9.021	4°, 29°	2.44431e6	10199.3	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] : b0b91cd9-d65d-4be3-869c-4a47d47de19a [observed] Occultation Date + Time : 2008-02-12 at 19:42:59 UT +/- 0.04 min [1] Object Designation : (409) Aspasia Orbit Class : MBA Star Designation : GDR3 3330874239020693120 Star Coordinates (ICRF) : RA = 06 23 31.9370, DE = +11 15 15.641 [2] Star Magnitudes : G = 10.74 mag, RP = 10.05 mag, BP = 11.27 mag Object Magnitude : V = 11.96 mag Estimated Magnitude Drop : 1.5 mag Estimated Max. Duration : 38.8 sec Object Mean Diameter : 162 km (src: astorb) Speed of the shadow : 4.2 km/s Elongation to Moon & Sun : 62° (sunlit = 35%), Sun = 131° Cross-track uncertainty : 2.0 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.04 mas, dup.src = 0 (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] : b0b91cd9-d65d-4be3-869c-4a47d47de19a [observed]

 Occultation Date + Time   : 2008-02-12 at 19:42:59 UT +/- 0.04 min  [1]
 Object Designation        : (409) Aspasia
 Orbit Class               : MBA
 Star Designation          : GDR3 3330874239020693120
 Star Coordinates (ICRF)   : RA = 06 23 31.9370, DE = +11 15 15.641  [2]
 Star Magnitudes           : G = 10.74 mag, RP = 10.05 mag, BP = 11.27 mag
 Object Magnitude          : V = 11.96 mag
 Estimated Magnitude Drop  : 1.5 mag
 Estimated Max. Duration   : 38.8 sec
 Object Mean Diameter      : 162 km  (src: astorb)
 Speed of the shadow       : 4.2 km/s
 Elongation to Moon & Sun  : 62° (sunlit = 35%), Sun = 131°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.04 mas, dup.src = 0  (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)

2008-02-12 / TYC 0740-01361-1 / (409) Aspasia

Sky projection (artificial light) for occ. time: 2008-02-12, 19:48 UT (JD = 2454509.325)