2025-10-24 / UCAC4 588-005764 / (283) Emma

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Björn Kattentidt	O+	VID	M280	DE	GPS	22:33:13	22:34:37.136	22:34:47.493	22:36:01	0.188	0.188	10.36	108.8
2	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	22:32:58	22:34:27.63	22:34:33.87	22:34:58	0.070	0.040	6.24	65.5

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#121 : a0809e30-ddb8-11f0-547e-c18ae73f4740 [db: observed]

Using prediction a0809e30-ddb8-11f0-547e-c18ae73f4740 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: X0,Y0 = 650.0, 58.4 km Circular diameter = 117 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: 2025-10-24, 22:33 UT (JD = 2460973.440)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 196	None	6.895	251°, 22°	2.44342031377e6	17553.1	0.0°	None	2010-04-15	not scaled	2008-11-14
# 1859	4.0	6.895	257°, 23°	2.44342031377e6	17553.1	0.0°	None	2017-09-21	147.0 +/- 14.0 km	2017-09-21

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] : a0809e30-ddb8-11f0-547e-c18ae73f4740 [observed] Occultation Date + Time : 2025-10-24 at 22:34:22 UT +/- 0.01 min [1] Object Designation : (283) Emma Orbit Class : MBA Star Designation : GDR3 0106608342487425792 Star Coordinates (ICRF) : RA = 02 24 53.8544, DE = +27 35 11.496 [2] Star Magnitudes : G = 13.64 mag, RP = 13.13 mag, BP = 13.98 mag Object Magnitude : V = 12.59 mag Estimated Magnitude Drop : 0.4 mag Estimated Max. Duration : 14.2 sec Object Mean Diameter : 148.1 km (src: astorb) Speed of the shadow : 10.5 km/s Elongation to Moon & Sun : 153° (sunlit = 10%), Sun = 163° Cross-track uncertainty : 1.7 mas = 2 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#121 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
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