Cora»Occultation

2026-01-27 / UCAC4 526-022043 / (34) Circe

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Alexandros Siakas, M. Gaitanas	O+	CCD	T279	GR	GPS	21:16:27	21:17:16.763	21:17:27.967	21:18:26	1.607	1.607	11.20	71.7
2	show	Alexandros Siakas, M. Gaitanas	O+	CCD	T279	GR	GPS	21:16:30	21:17:25.556	21:17:33.723	21:18:30	0.350	0.350	8.17	52.3

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#124 : 3938b510-de6b-11f0-4858-e88159f75f12 [db: asteroids]

Using prediction 3938b510-de6b-11f0-4858-e88159f75f12 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 = -1126.1, 35.7 km
Circular diameter = 149 km

From 2 chords (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: 2026-01-27, 21:17 UT (JD = 2461068.387)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 128	None	12.175	94°, 35°	2.443602e6	17466.4	0.0°	size from AO is 117+/-14 km	2013-07-23	96.0 +/- 10.0 km	2011-03-28
# 129	None	12.175	275°, 51°	2.443602e6	17466.4	0.0°	size from AO is 116+/-11 km	2013-07-23	107.0 +/- 10.0 km	2011-03-28

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] : 3938b510-de6b-11f0-4858-e88159f75f12 [asteroids] Occultation Date + Time : 2026-01-27 at 21:18:26 UT +/- 0.02 min [1] Object Designation : (34) Circe Orbit Class : MBA Star Designation : GDR3 3345705925024455296 Star Coordinates (ICRF) : RA = 06 08 39.7343, DE = +15 08 23.451 [2] Star Magnitudes : G = 13.46 mag, RP = 12.87 mag, BP = 13.87 mag Object Magnitude : V = 12.55 mag Estimated Magnitude Drop : 0.4 mag Estimated Max. Duration : 17.7 sec Object Mean Diameter : 113.5 km (src: astorb) Speed of the shadow : 6.4 km/s Elongation to Moon & Sun : 35° (sunlit = 69%), Sun = 143° Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.05 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#124 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 3938b510-de6b-11f0-4858-e88159f75f12 [asteroids]

 Occultation Date + Time   : 2026-01-27 at 21:18:26 UT +/- 0.02 min  [1]
 Object Designation        : (34) Circe
 Orbit Class               : MBA
 Star Designation          : GDR3 3345705925024455296
 Star Coordinates (ICRF)   : RA = 06 08 39.7343, DE = +15 08 23.451  [2]
 Star Magnitudes           : G = 13.46 mag, RP = 12.87 mag, BP = 13.87 mag
 Object Magnitude          : V = 12.55 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 17.7 sec
 Object Mean Diameter      : 113.5 km  (src: astorb)
 Speed of the shadow       : 6.4 km/s
 Elongation to Moon & Sun  : 35° (sunlit = 69%), Sun = 143°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#124
 Note                      : FP:true

 
 [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)