2024-12-27 / UCAC4 500-001601 / (2483) Guinevere

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Gerard VAUDESCAL	O+	VID	T250	FR	GPS	18:49:20	18:50:18.6	18:50:21.3	18:51:24	0.5	0.5	2.70	29.7
2	show	Michel Boutet	O+	VID	M300	FR	GPS	18:47:38	18:50:27.94	18:50:30.18	18:52:04	0.16	0.16	2.24	24.6

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#60 : d7cc12a0-ddb5-11f0-547e-fbf27fffc517 [db: observed]

Using prediction d7cc12a0-ddb5-11f0-547e-fbf27fffc517 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: X0,Y0 = 558.4, 18.4 km Circular diameter = 34 km From 2 chords (VID) Chords to ignore: Fill: Grid: Show (close) miss chords: 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: 2024-12-27, 18:49 UT (JD = 2460672.284)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 1498	None	14.731	194°, 59°	2.449214e6	11458.3	0.0°	None	None	not scaled	2016-01-12
# 1499	None	14.731	19°, 70°	2.449214e6	11458.3	0.0°	None	None	not scaled	2016-01-12

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

Map with groundtrack and observer stations

Event Details

Occultation UUID [and DB] : d7cc12a0-ddb5-11f0-547e-fbf27fffc517 [observed] Occultation Date + Time : 2024-12-27 at 18:49:01 UT +/- 0.01 min [1] Object Designation : (2483) Guinevere Orbit Class : MBA Star Designation : GDR3 2581559641666890112 Star Coordinates (ICRF) : RA = 01 02 57.0270, DE = +09 53 51.747 [2] Star Magnitudes : G = 13.28 mag, RP = 12.53 mag, BP = 13.89 mag Object Magnitude : V = 16.39 mag Estimated Magnitude Drop : 3.2 mag Estimated Max. Duration : 4.0 sec Object Mean Diameter : 44.2 km (src: astorb) Speed of the shadow : 11.0 km/s Elongation to Moon & Sun : 139° (sunlit = 10%), Sun = 102° Cross-track uncertainty : 1.3 mas = 2 km = 0.06 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#60 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

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