Collaborative Occultation Resources and Archive (CORA)

2024-09-24 / UCAC4 414-118812 / (386) Siegena

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	18:42:40	18:44:02.5	18:44:16.4	18:44:19	0.3	0.8	13.90	177.9
2	show	Zdenek Moravec	O+	CCD	T600	CZ	GPS	18:41:37	18:43:58.0	18:44:13.49	18:45:36	0.2	0.15	15.49	198.3

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

2 observations found in db: sodis

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

JPL#133 : 472f2310-c356-11ef-5276-d4850dba8aea [db: observed]

JPL#131 : 1f054cb0-859f-11ef-78cd-949ff7ff210d [db: asteroids]

Using prediction 472f2310-c356-11ef-5276-d4850dba8aea 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 = -3056.6, 23.6 km
Circular diameter = 197 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: 2024-09-24, 18:44 UT (JD = 2460578.281)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 447	None	9.765	289°, 25°	2.444019e6	16559.3	0.0°	None	None	not scaled	2012-07-30
# 1815	4.0	9.765	287°, 25°	2.444019e6	16559.3	0.0°	None	2017-06-19	168.0 +/- 5.0 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] : 472f2310-c356-11ef-5276-d4850dba8aea [observed] Occultation Date + Time : 2024-09-24 at 18:48:47 UT +/- 0.01 min [1] Object Designation : (386) Siegena Orbit Class : MBA Star Designation : GDR3 4204851499100496768 Star Coordinates (ICRF) : RA = 19 17 48.7093, DE = -07 22 11.530 [2] Star Magnitudes : G = 13.91 mag, RP = 13.28 mag, BP = 14.38 mag Object Magnitude : V = 12.7 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 12.9 sec Object Mean Diameter : 165.0 km (src: astorb) Speed of the shadow : 12.8 km/s Elongation to Moon & Sun : 153° (sunlit = 50%), Sun = 107° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#133 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 472f2310-c356-11ef-5276-d4850dba8aea [observed]

 Occultation Date + Time   : 2024-09-24 at 18:48:47 UT +/- 0.01 min  [1]
 Object Designation        : (386) Siegena
 Orbit Class               : MBA
 Star Designation          : GDR3 4204851499100496768
 Star Coordinates (ICRF)   : RA = 19 17 48.7093, DE = -07 22 11.530  [2]
 Star Magnitudes           : G = 13.91 mag, RP = 13.28 mag, BP = 14.38 mag
 Object Magnitude          : V = 12.7 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 12.9 sec
 Object Mean Diameter      : 165.0 km  (src: astorb)
 Speed of the shadow       : 12.8 km/s
 Elongation to Moon & Sun  : 153° (sunlit = 50%), Sun = 107°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#133

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

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