Cora»Occultation

2023-08-14 / UCAC4 330-195111 / (54) Alexandra

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Delincak	O+	VID	M400	SK	NTP	19:17:40	19:19:32.5	19:19:47.6	19:21:49	1.32	1.32	15.10	101.2

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

1 observation found in db: sodis

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

JPL#210 : ebbe7f20-ddb3-11f0-547e-4d9675fb70e8 [db: observed]

Using prediction ebbe7f20-ddb3-11f0-547e-4d9675fb70e8 for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2023-08-14, 19:18 UT (JD = 2460171.304)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 136	None	7.023	156°, 13°	2.438949e6	21222.3	0.0°	size from AO is 128+/-11 km	2013-07-23	135.0 +/- 20.0 km	2011-03-28
# 1817	4.0	7.023	154°, 17°	2.438949e6	21222.3	0.0°	None	2017-06-19	143.0 +/- 5.0 km	2017-06-07

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] : ebbe7f20-ddb3-11f0-547e-4d9675fb70e8 [observed] Occultation Date + Time : 2023-08-14 at 19:07:27 UT +/- 0.01 min [1] Object Designation : (54) Alexandra Orbit Class : MBA Star Designation : GDR3 6768390205298913152 Star Coordinates (ICRF) : RA = 19 42 30.1719, DE = -24 04 20.549 [2] Star Magnitudes : G = 12.5 mag, RP = 11.9 mag, BP = 12.76 mag Object Magnitude : V = 10.86 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 24.6 sec Object Mean Diameter : 165.8 km (src: astorb) Speed of the shadow : 6.7 km/s Elongation to Moon & Sun : 169° (sunlit = 2%), Sun = 151° Cross-track uncertainty : 2.0 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#210 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

Event Details

Occultation UUID [and DB] : ebbe7f20-ddb3-11f0-547e-4d9675fb70e8 [observed] Occultation Date + Time : 2023-08-14 at 19:07:27 UT +/- 0.01 min [1] Object Designation : (54) Alexandra Orbit Class : MBA Star Designation : GDR3 6768390205298913152 Star Coordinates (ICRF) : RA = 19 42 30.1719, DE = -24 04 20.549 [2] Star Magnitudes : G = 12.5 mag, RP = 11.9 mag, BP = 12.76 mag Object Magnitude : V = 10.86 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 24.6 sec Object Mean Diameter : 165.8 km (src: astorb) Speed of the shadow : 6.7 km/s Elongation to Moon & Sun : 169° (sunlit = 2%), Sun = 151° Cross-track uncertainty : 2.0 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#210 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

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