Cora»Occultation

2023-11-25 / UCAC4 603-026747 / (407) Arachne

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Nosal	O+	VID	M250	SK	NTP	19:28:06	19:30:06.45	19:30:12.66	19:32:09	0.13	0.12	6.21	55.9
2	show	Marek Harman	O-	VID	M350	SK	NTP	19:28:03			19:32:09

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#78 : dbff4e50-ddb0-11f0-547e-ebb6f3fade15 [db: observed]

JPL#78 : 3be80ac0-ddb4-11f0-547e-a7c2dfff1d6d [db: observed]

Using prediction 3be80ac0-ddb4-11f0-547e-a7c2dfff1d6d for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2023-11-25, 19:30 UT (JD = 2460274.313)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 813	None	22.626	43°, -58°	2.446447e6	13827.3	0.0°	None	None	not scaled	2016-01-04
# 814	None	22.626	241°, -63°	2.446447e6	13827.3	0.0°	None	None	not scaled	2016-01-04

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] : 3be80ac0-ddb4-11f0-547e-a7c2dfff1d6d [observed] Occultation Date + Time : 2023-11-25 at 19:23:28 UT +/- 0.01 min [1] Object Designation : (407) Arachne Orbit Class : MBA Star Designation : GDR3 3443978762488152192 Star Coordinates (ICRF) : RA = 05 51 33.5025, DE = +30 24 35.621 [2] Star Magnitudes : G = 12.36 mag, RP = 11.45 mag, BP = 13.22 mag Object Magnitude : V = 12.84 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 10.5 sec Object Mean Diameter : 95.1 km (src: astorb) Speed of the shadow : 9.0 km/s Elongation to Moon & Sun : 45° (sunlit = 97%), Sun = 154° Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#78 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 3be80ac0-ddb4-11f0-547e-a7c2dfff1d6d [observed] Occultation Date + Time : 2023-11-25 at 19:23:28 UT +/- 0.01 min [1] Object Designation : (407) Arachne Orbit Class : MBA Star Designation : GDR3 3443978762488152192 Star Coordinates (ICRF) : RA = 05 51 33.5025, DE = +30 24 35.621 [2] Star Magnitudes : G = 12.36 mag, RP = 11.45 mag, BP = 13.22 mag Object Magnitude : V = 12.84 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 10.5 sec Object Mean Diameter : 95.1 km (src: astorb) Speed of the shadow : 9.0 km/s Elongation to Moon & Sun : 45° (sunlit = 97%), Sun = 154° Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#78 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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