Collaborative Occultation Resources and Archive (CORA)

2025-02-16 / UCAC4 542-005823 / (593) Titania

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Eberhard Bredner	O+	VID	M250	DE	GPS	21:23:00	21:23:30.0	21:23:33.8	21:23:50	0.45	0.45	3.80	85.9
2	show	Olivier Schreurs	O+	VID	M406	BE	GPS	21:22:26	21:23:24.00	21:23:27.22	21:24:27	0.02	0.02	3.22	72.8

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#64 : a38df610-85fb-11ef-78cd-0f04ede7500d [db: asteroids]

Using prediction a38df610-85fb-11ef-78cd-0f04ede7500d 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 = 817.8, 13.4 km
Circular diameter = 99 km

From 2 chords (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: 2025-02-16, 21:22 UT (JD = 2460723.390)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 5600	1.0	9.898	175°, 58°	2.457228e6	3495.4	0.0°	None	2020-10-05	not scaled	2019-10-23

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] : a38df610-85fb-11ef-78cd-0f04ede7500d [asteroids] Occultation Date + Time : 2025-02-16 at 21:19:29 UT +/- 0.0 min [1] Object Designation : (593) Titania Orbit Class : MBA Star Designation : GDR3 0058875347269956224 Star Coordinates (ICRF) : RA = 03 10 55.4151, DE = +18 12 53.158 [2] Star Magnitudes : G = 11.95 mag, RP = 11.27 mag, BP = 12.48 mag Object Magnitude : V = 13.98 mag Estimated Magnitude Drop : 2.2 mag Estimated Max. Duration : 3.3 sec Object Mean Diameter : 75.3 km (src: astorb) Speed of the shadow : 22.6 km/s Elongation to Moon & Sun : 146° (sunlit = 83%), Sun = 82° Cross-track uncertainty : 2.0 mas = 2 km = 0.04 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#64 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : a38df610-85fb-11ef-78cd-0f04ede7500d [asteroids]

 Occultation Date + Time   : 2025-02-16 at 21:19:29 UT +/- 0.0 min  [1]
 Object Designation        : (593) Titania
 Orbit Class               : MBA
 Star Designation          : GDR3 0058875347269956224
 Star Coordinates (ICRF)   : RA = 03 10 55.4151, DE = +18 12 53.158  [2]
 Star Magnitudes           : G = 11.95 mag, RP = 11.27 mag, BP = 12.48 mag
 Object Magnitude          : V = 13.98 mag
 Estimated Magnitude Drop  : 2.2 mag
 Estimated Max. Duration   : 3.3 sec
 Object Mean Diameter      : 75.3 km  (src: astorb)
 Speed of the shadow       : 22.6 km/s
 Elongation to Moon & Sun  : 146° (sunlit = 83%), Sun = 82°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#64

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

More Data and Informations

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