2024-10-21 / UCAC4 312-244334 / (1241) Dysona

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	CCD	M203	ES	NTP	18:58:15	19:00:16.153	19:00:19.816	19:02:15	0.14	0.14	3.66	86.7
2	show	Carles Schnabel	O+	VID	M400	ES	GPS	18:58:29	19:00:26.70	19:00:30.22	19:02:12	0.16	0.16	3.52	83.4

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#81 : 8af9a140-ddb5-11f0-547e-d5f5ec5f2473 [db: observed]

Using prediction 8af9a140-ddb5-11f0-547e-d5f5ec5f2473 for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: X0,Y0 = 1997.5, 81.6 km Circular diameter = 189 km From 2 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: 2024-10-21, 19:00 UT (JD = 2460605.292)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 529	None	8.607	124°, -68°	2.451131e6	9474.3	0.0°	None	None	not scaled	2013-02-11
# 530	None	8.607	20°, -23°	2.451131e6	9474.3	0.0°	None	None	not scaled	2013-02-11

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] : 8af9a140-ddb5-11f0-547e-d5f5ec5f2473 [observed] Occultation Date + Time : 2024-10-21 at 18:57:06 UT +/- 0.0 min [1] Object Designation : (1241) Dysona Orbit Class : MBA Star Designation : GDR3 6765599374208539776 Star Coordinates (ICRF) : RA = 19 25 32.1813, DE = -27 46 59.927 [2] Star Magnitudes : G = 14.02 mag, RP = 13.52 mag, BP = 14.36 mag Object Magnitude : V = 15.32 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 3.5 sec Object Mean Diameter : 83.0 km (src: astorb) Speed of the shadow : 23.7 km/s Elongation to Moon & Sun : 159° (sunlit = 76%), Sun = 80° Cross-track uncertainty : 0.7 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.93 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#81 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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