Cora»Occultation

2025-11-20 / UCAC4 407-133101 / (322) Phaeo

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Eric Barbotin	O+	VID	T508	FR	GPS	18:03:44	18:05:16.34	18:05:18.71	18:06:44	0.050	0.050	2.37	63.0
2	show	Gregor Krannich	O+	VID	M350	DE	GPS	18:04:44	18:05:43.616	18:05:45.147	18:06:44	0.089	0.089	1.53	40.7

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#87 : bf040cc0-ddb8-11f0-547e-7079fbdf5fa2 [db: observed]

Using prediction bf040cc0-ddb8-11f0-547e-7079fbdf5fa2 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 = 923.0, 30.2 km
Circular diameter = 68 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: 2025-11-20, 18:04 UT (JD = 2461000.253)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 5151	1.0	17.573	77°, 12°	2.457241e6	3759.3	0.0°	None	2020-10-05	not scaled	2019-10-23
# 5152	1.0	17.573	253°, 23°	2.457241e6	3759.3	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] : bf040cc0-ddb8-11f0-547e-7079fbdf5fa2 [observed] Occultation Date + Time : 2025-11-20 at 18:03:54 UT +/- 0.01 min [1] Object Designation : (322) Phaeo Orbit Class : MBA Star Designation : GDR3 6908644325149889024 Star Coordinates (ICRF) : RA = 21 00 34.3119, DE = -08 36 01.147 [2] Star Magnitudes : G = 13.53 mag, RP = 12.98 mag, BP = 13.9 mag Object Magnitude : V = 13.66 mag Estimated Magnitude Drop : 0.8 mag Estimated Max. Duration : 2.7 sec Object Mean Diameter : 70.8 km (src: astorb) Speed of the shadow : 26.6 km/s Elongation to Moon & Sun : 72° (sunlit = 0%), Sun = 77° Cross-track uncertainty : 2.0 mas = 3 km = 0.04 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#87 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : bf040cc0-ddb8-11f0-547e-7079fbdf5fa2 [observed]

 Occultation Date + Time   : 2025-11-20 at 18:03:54 UT +/- 0.01 min  [1]
 Object Designation        : (322) Phaeo
 Orbit Class               : MBA
 Star Designation          : GDR3 6908644325149889024
 Star Coordinates (ICRF)   : RA = 21 00 34.3119, DE = -08 36 01.147  [2]
 Star Magnitudes           : G = 13.53 mag, RP = 12.98 mag, BP = 13.9 mag
 Object Magnitude          : V = 13.66 mag
 Estimated Magnitude Drop  : 0.8 mag
 Estimated Max. Duration   : 2.7 sec
 Object Mean Diameter      : 70.8 km  (src: astorb)
 Speed of the shadow       : 26.6 km/s
 Elongation to Moon & Sun  : 72° (sunlit = 0%), Sun = 77°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#87
 Note                      : FP:true

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

More Data and Informations

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