Cora»Occultation

2018-11-18 / TYC 2373-01454-1 / (38) Leda

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	J. Srba/P. Svozil	O+	CCD	M300	CZ	NTP	04:34:55	04:35:23.56	04:35:32.71	04:36:55	0.08	0.08	9.15	79.6
2	show	Petr Zeleny	O+	VID	M254	CZ	NTP	04:33:00	04:35:25.6	04:35:32.5	04:38:00	1	1	6.90	60.0
3	show	M. Masek/M. Tylsar	O+	CCD	M200	CZ	NTP	04:35:05	04:35:26.86	04:35:36.39	04:36:35	0.21	0.21	9.53	82.9
4	show	Jiri Kubanek	O+	VID	M203	CZ	GPS++	04:33:45	04:35:41.15	04:35:45.95	04:37:51	0.08	0.08	4.80	41.8
5	show	Jaromir Jindra	O+	VID	M203	CZ	GPS++	04:34:23	04:35:36.02	04:35:45.30	04:36:50	0.03	0.03	9.28	80.7
6	show	Jan Manek	O+	CCD	M205	CZ	NTP	04:32:44	04:35:37.32	04:35:46.56	04:36:44	0.03	0.03	9.24	80.4
7	show	Jiri Kubanek	O+	VID	M150	CZ	GPS++	04:34:38	04:35:41.10	04:35:48.23	04:36:40	0.16	0.16	7.13	62.0
8	show	Michal Rottenborn	O+	VID	M303	CZ	GPS++	04:33:49	04:35:40.07	04:35:48.65	04:37:49	0.02	0.04	8.58	74.6
9	show	Filip Walter	O+	CCD	M350	CZ	NTP	04:33:13	04:35:39.74	04:35:49.23	04:38:39	0.11	0.11	9.49	82.6
10	show	Jiri Polak	O+	VID	M200	CZ	GPS++	04:33:50	04:35:43.36	04:35:51.56	04:38:06	0.02	0.02	8.20	71.3
11	show	Vaclav Priban	O+	VID	M300	CZ	RAD++	04:33:50	04:35:39.77	04:35:49.49	04:37:16	0.02	0.02	9.72	84.6
12	show	Jiri Lev	O+	VID	M500	CZ	GPS++	04:35:20	04:35:41.88	04:35:51.00	04:38:20	0.02	0.02	9.12	79.3
13	show	Ladislav Cervinka	O+	VID	M200	CZ	GPS++	04:23:13	04:35:41.93	04:35:48.62	04:37:43	0.04	0.03	6.69	58.2
14	show	E. Bredner et al	O+	VID	M600	DE	GPS++	04:30:00	04:36:17.30	04:36:26.74	04:40:00	0.04	0.04	9.44	82.1
15	show	Thomas Haenel	O+	CCD	L50	DE	NTP	04:29:59	04:36:18.75	04:36:28.35	04:40:11	0.8	0.8	9.60	83.5
16	show	Bernd Gaehrken	O+	VID	L80	DE	GPS	04:33:30	04:36:21.99	04:36:31.71	04:38:30	0.5	0.5	9.72	84.6
17	show	Esdert Edens	O+	VID	M235	NL	GPS++	04:33:43	04:36:32.20	04:36:41.40	04:39:42	0.04	0.04	9.20	80.0
18	show	Peter Delincak	O-	CCD	M400	SK		04:33:00			04:37:00
19	show	Karel Halir	O-	VID	M507	CZ		04:33:18			04:38:18
20	show	Milan Antos	O-	CCD	M254	CZ		04:34:40			04:36:40
21	show	Henk De Groot	O-	VID	M356	NL		04:32:33			04:39:10
22	show	Jan-Maarten Winkel	O-	VID	M310	NL		04:35:31			04:37:48

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

22 observations found in db: euraster

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

JPL#130 : 6bbc9465-2905-4882-9b8c-9555ce9d608e [db: observed]

Using prediction 6bbc9465-2905-4882-9b8c-9555ce9d608e 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 = 114 x 87 km
a',b' = 57.0, 43.3 km
X0,Y0 = 538.5, 25.4 km
Mean diameter = 99 km

From 17 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: 2018-11-18, 04:34 UT (JD = 2458440.690)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 720	None	12.836	161°, -15°	2.443956e6	14484.7	0.0°	None	2013-10-18	not scaled	2013-10-16
# 721	None	12.836	345°, -4°	2.443956e6	14484.7	0.0°	None	2013-10-18	not scaled	2013-10-16

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] : 6bbc9465-2905-4882-9b8c-9555ce9d608e [observed] Occultation Date + Time : 2018-11-18 at 04:44:23 UT +/- 0.01 min [1] Object Designation : (38) Leda Orbit Class : MBA Star Designation : GDR3 0171293607983677056 Star Coordinates (ICRF) : RA = 04 33 46.3683, DE = +31 07 27.435 [2] Star Magnitudes : G = 10.13 mag, RP = 9.32 mag, BP = 10.82 mag Object Magnitude : V = 11.71 mag Estimated Magnitude Drop : 1.8 mag Estimated Max. Duration : 13.3 sec Object Mean Diameter : 116 km (src: astorb) Speed of the shadow : 8.7 km/s Elongation to Moon & Sun : 78° (sunlit = 74%), Sun = 162° Cross-track uncertainty : 1.0 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.84 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#130 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 6bbc9465-2905-4882-9b8c-9555ce9d608e [observed]

 Occultation Date + Time   : 2018-11-18 at 04:44:23 UT +/- 0.01 min  [1]
 Object Designation        : (38) Leda
 Orbit Class               : MBA
 Star Designation          : GDR3 0171293607983677056
 Star Coordinates (ICRF)   : RA = 04 33 46.3683, DE = +31 07 27.435  [2]
 Star Magnitudes           : G = 10.13 mag, RP = 9.32 mag, BP = 10.82 mag
 Object Magnitude          : V = 11.71 mag
 Estimated Magnitude Drop  : 1.8 mag
 Estimated Max. Duration   : 13.3 sec
 Object Mean Diameter      : 116 km  (src: astorb)
 Speed of the shadow       : 8.7 km/s
 Elongation to Moon & Sun  : 78° (sunlit = 74%), Sun = 162°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.84 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#130

 
 [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)

2018-11-18 / TYC 2373-01454-1 / (38) Leda

Sky projection (artificial light) for occ. time: 2018-11-18, 04:34 UT (JD = 2458440.690)