2024-10-12 / UCAC4 357-162782 / (924) Toni

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	David Lafuente Aznar, Silvia Calavia	O+	CCD	M200	ES	GPS	20:00:16	20:01:18.664	20:01:22.228	20:02:35	0.267	0.267	3.56	76.5
2	show	Jorge JUAN	O+	VID	M410	ES	GPS	19:58:21	20:01:27.3	20:01:30.1	20:04:07	0.6	1.0	2.80	60.2
3	show	Antoni Selva, Carlos Perello	O+	VID	M500	ES	GPS	20:00:51	20:01:27.750	20:01:31.440	20:02:51	0.06	0.06	3.69	79.3

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

3 observations found in db: sodis

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

JPL#76 : 2548a380-ddb2-11f0-547e-eea4fdfb3230 [db: observed]

Using prediction 2548a380-ddb2-11f0-547e-eea4fdfb3230 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: Ellipse profile fit was not successful. Trying circular fit. Circular diameter = 78 km From 3 chords (CCD,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: 2024-10-12, 20:00 UT (JD = 2460596.333)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 5847	1.0	19.437	40°, 32°	2.457249e6	3347.3	0.0°	None	2020-10-05	not scaled	2019-10-23
# 5848	1.0	19.438	214°, 37°	2.457249e6	3347.3	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

Map with groundtrack and observer stations

Event Details

Occultation UUID [and DB] : 2548a380-ddb2-11f0-547e-eea4fdfb3230 [observed] Occultation Date + Time : 2024-10-12 at 19:59:27 UT +/- 0.0 min [1] Object Designation : (924) Toni Orbit Class : MBA Star Designation : GDR3 4098417433530263552 Star Coordinates (ICRF) : RA = 18 47 57.7918, DE = -18 44 13.440 [2] Star Magnitudes : G = 13.68 mag, RP = 12.69 mag, BP = 14.7 mag Object Magnitude : V = 14.95 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 4.0 sec Object Mean Diameter : 85.5 km (src: astorb) Speed of the shadow : 21.5 km/s Elongation to Moon & Sun : 35° (sunlit = 72%), Sun = 81° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#76 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

Aladin Sky Atlas

Aladin Lite direct link (has Gaia overlay)