2024-12-23 / UCAC4 624-016709 / (1284) Latvia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Alberto Ossola	O+	VID	M230	CH	GPS	20:37:02	20:38:20.5	20:38:25.6	20:39:24	1	0.6	5.10	42.3
2	show	Stefano Sposetti	O+	VID	M420	CH	GPS	20:37:35	20:38:17.356	20:38:21.965	20:39:10	0.342	0.342	4.61	38.3

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#103 : cd4bee90-ddb5-11f0-547e-42ba81dff006 [db: observed]

Using prediction cd4bee90-ddb5-11f0-547e-42ba81dff006 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: X0,Y0 = 1228.0, 25.5 km Circular diameter = 44 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: 2024-12-23, 20:37 UT (JD = 2460668.359)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 4535	1.0	9.551	105°, 32°	2.457248e6	3420.4	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] : cd4bee90-ddb5-11f0-547e-42ba81dff006 [observed] Occultation Date + Time : 2024-12-23 at 20:38:34 UT +/- 0.01 min [1] Object Designation : (1284) Latvia Orbit Class : MBA Star Designation : GDR3 0176241410308322048 Star Coordinates (ICRF) : RA = 04 26 24.1848, DE = +34 45 55.529 [2] Star Magnitudes : G = 14.29 mag, RP = 13.37 mag, BP = 15.16 mag Object Magnitude : V = 13.12 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 4.4 sec Object Mean Diameter : 36.8 km (src: astorb) Speed of the shadow : 8.3 km/s Elongation to Moon & Sun : 121° (sunlit = 41%), Sun = 155° Cross-track uncertainty : 0.8 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.61 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#103 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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