Cora»Occultation

2026-01-17 / UCAC4 631-020826 / (255) Oppavia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Ferran Casarramona	O+	VID	M200	ES	GPS	19:27:02	19:31:55.2	19:31:56.3	19:36:00	0.300	0.500	1.10	6.9
2	show	Deborah Smith, Eric Smith	O+	VID	M150	ES	GPS	19:30:55	19:31:53.674	19:31:56.174	19:32:55	0.174	0.174	2.50	15.8
3	show	Deborah Smith	O+	VID	M300	ES	GPS	19:31:05	19:31:52.100	19:31:57.892	19:33:05	0.089	0.089	5.79	36.5
4	show	Leszek Benedyktowicz	O+	VID	M200	PL	GPS	19:24:35	19:26:09.300	19:26:14.900	19:27:33	0.200	0.200	5.60	35.3
5	show	Marcin Filipek	O+	VID	M250	PL	GPS	19:25:41	19:26:05.80	19:26:14.82	19:26:49	0.200	0.200	9.02	56.8
6	show	Deborah Smith	O-	VID	M250	ES	GPS	19:30:56	::	::	19:32:56

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

6 observations found in db: sodis

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

JPL#78 : 0969d390-de6c-11f0-4858-0c82fbcf3fed [db: asteroids]

Using prediction 0969d390-de6c-11f0-4858-0c82fbcf3fed 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 = 67 x 48 km
a',b' = 33.6, 24.2 km
X0,Y0 = 796.8, 26.1 km
Mean diameter = 57 km

From 5 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: 2026-01-17, 19:30 UT (JD = 2461058.313)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 4939	1.0	19.497	134°, 46°	2.45723e6	3828.3	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] : 0969d390-de6c-11f0-4858-0c82fbcf3fed [asteroids] Occultation Date + Time : 2026-01-17 at 19:27:20 UT +/- 0.01 min [1] Object Designation : (255) Oppavia Orbit Class : MBA Star Designation : GDR3 0186218413179241472 Star Coordinates (ICRF) : RA = 04 57 21.3417, DE = +36 03 26.254 [2] Star Magnitudes : G = 14.47 mag, RP = 13.48 mag, BP = 15.48 mag Object Magnitude : V = 14.83 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 9.1 sec Object Mean Diameter : 57.4 km (src: astorb) Speed of the shadow : 6.3 km/s Elongation to Moon & Sun : 150° (sunlit = 1%), Sun = 138° Cross-track uncertainty : 0.7 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.07 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#78 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 0969d390-de6c-11f0-4858-0c82fbcf3fed [asteroids]

 Occultation Date + Time   : 2026-01-17 at 19:27:20 UT +/- 0.01 min  [1]
 Object Designation        : (255) Oppavia
 Orbit Class               : MBA
 Star Designation          : GDR3 0186218413179241472
 Star Coordinates (ICRF)   : RA = 04 57 21.3417, DE = +36 03 26.254  [2]
 Star Magnitudes           : G = 14.47 mag, RP = 13.48 mag, BP = 15.48 mag
 Object Magnitude          : V = 14.83 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 9.1 sec
 Object Mean Diameter      : 57.4 km  (src: astorb)
 Speed of the shadow       : 6.3 km/s
 Elongation to Moon & Sun  : 150° (sunlit = 1%), Sun = 138°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78
 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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