2024-08-29 / UCAC4 368-183225 / (76) Freia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	CCD	M203	ES	NTP	21:38:13	21:40:15.02	21:40:22.10	21:42:13	0.18	0.18	7.08	79.3
2	show	Jose Antonio de los Reyes, Sensi Pastor	O+	VID	M300	ES	GPS	21:38:33	21:40:2.8	21:40:15.5	21:42:00	0.2	0.4	12.70	142.2
3	show	Roberto Di Luca, Alboresi - Frisoni	O+	VID	M400	IT	GPS	21:37:20	21:38:23.6	21:38:39.7	21:39:20	0.30	0.30	16.10	180.3
4	show	Daniel Blazewicz	O+	VID	M350	PL	GPS	21:33:55	21:37:30.81	21:37:43.68	21:41:00	0.09	0.12	12.87	144.1

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

4 observations found in db: sodis

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

JPL#97 : 64b29690-ddb5-11f0-547e-85dd4d2e9ddd [db: observed]

JPL#97 : 64b2bda0-ddb5-11f0-547e-eb93fbf337ab [db: observed]

Using prediction 64b2bda0-ddb5-11f0-547e-eb93fbf337ab for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: Size = 179 x 172 km a',b' = 89.7, 86.0 km X0,Y0 = 345.2, -588.9 km Mean diameter = 176 km From 4 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: 2024-08-29, 21:40 UT (JD = 2460552.403)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 442	None	9.973	140°, 14°	2.44485e6	15702.4	0.0°	None	None	not scaled	2012-07-30
# 443	None	9.973	320°, 17°	2.44485e6	15702.4	0.0°	None	None	not scaled	2012-07-30

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] : 64b2bda0-ddb5-11f0-547e-eb93fbf337ab [observed] Occultation Date + Time : 2024-08-29 at 21:40:00 UT +/- 0.02 min [1] Object Designation : (76) Freia Orbit Class : MBA Star Designation : GDR3 6874787785150684032 Star Coordinates (ICRF) : RA = 20 27 26.8344, DE = -16 25 44.608 [2] Star Magnitudes : G = 13.97 mag, RP = 19.69 mag, BP = 20.86 mag Object Magnitude : V = 13.8 mag Estimated Magnitude Drop : 0.7 mag Estimated Max. Duration : 16.5 sec Object Mean Diameter : 183.7 km (src: astorb) Speed of the shadow : 11.2 km/s Elongation to Moon & Sun : 163° (sunlit = 16%), Sun = 148° Cross-track uncertainty : 5.6 mas = 11 km = 0.06 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#97 Note : FP:true Object is a Gaia mass determination target ! [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

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