Cora»Occultation

2024-08-20 / UCAC4 489-117727 / (950) Ahrensa

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Tickner	O+	VID	M356	GB	GPS	23:13:05	23:15:07.30	23:15:08.46	23:17:09	0.3	0.13	1.16	15.5
2	show	Simon Kidd	O-	VID	M350	GB	GPS	23:14:00			23:16:00

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 : ed0ae730-ddb1-11f0-547e-5ce7ff7daafe [db: observed]

Using prediction ed0ae730-ddb1-11f0-547e-5ce7ff7daafe for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2024-08-20, 23:15 UT (JD = 2460543.469)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3372	1.0	205.690	10°, 89°	2.449986e6	10557.5	0.0°	None	2019-09-26	not scaled	2019-05-07

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

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : ed0ae730-ddb1-11f0-547e-5ce7ff7daafe [observed] Occultation Date + Time : 2024-08-20 at 23:20:38 UT +/- 0.0 min [1] Object Designation : (950) Ahrensa Orbit Class : MBA Star Designation : GDR3 4298165917077059328 Star Coordinates (ICRF) : RA = 19 53 49.3986, DE = +07 41 43.899 [2] Star Magnitudes : G = 14.95 mag, RP = 14.08 mag, BP = 15.75 mag Object Magnitude : V = 15.43 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 1.1 sec Object Mean Diameter : 15.0 km (src: astorb) Speed of the shadow : 13.4 km/s Elongation to Moon & Sun : 51° (sunlit = 98%), Sun = 142° Cross-track uncertainty : 0.4 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.96 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

Event Details

Occultation UUID [and DB] : ed0ae730-ddb1-11f0-547e-5ce7ff7daafe [observed] Occultation Date + Time : 2024-08-20 at 23:20:38 UT +/- 0.0 min [1] Object Designation : (950) Ahrensa Orbit Class : MBA Star Designation : GDR3 4298165917077059328 Star Coordinates (ICRF) : RA = 19 53 49.3986, DE = +07 41 43.899 [2] Star Magnitudes : G = 14.95 mag, RP = 14.08 mag, BP = 15.75 mag Object Magnitude : V = 15.43 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 1.1 sec Object Mean Diameter : 15.0 km (src: astorb) Speed of the shadow : 13.4 km/s Elongation to Moon & Sun : 51° (sunlit = 98%), Sun = 142° Cross-track uncertainty : 0.4 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.96 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

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