Cora»Occultation

2024-09-29 / UCAC4 294-192676 / (760) Massinga

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carles Schnabel	O+	VID	M400	ES	GPS	19:39:07	19:41:16.52	19:41:20.76	19:43:17	0.04	0.04	4.24	72.5
2	show	Jorge JUAN	O+	VID	M410	ES	GPS	19:39:21	19:41:15.88	19:41:20.52	19:43:08	0.08	0.08	4.64	79.3
3	show	Antoni Selva, Carlos Perello	O+	VID	M500	ES	GPS	19:39:48	19:41:17.840	19:41:20.920	19:42:54	0.04	0.04	3.08	52.7
4	show	Jordi Marco	O-	CCD	M235	ES	NTP	19:39:21			19:43:20

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

4 observations found in db: sodis

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

JPL#87 : 7d2262f0-ddb5-11f0-547e-e11a7fd54e24 [db: observed]

Using prediction 7d2262f0-ddb5-11f0-547e-e11a7fd54e24 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 79 x 48 km
a',b' = 39.5, 24.0 km
X0,Y0 = 1771.6, 1.6 km
Mean diameter = 62 km

From 3 chords (VID)

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: 2024-09-29, 19:41 UT (JD = 2460583.320)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 5736	1.0	10.761	156°, 47°	2.457319e6	3264.3	0.0°	None	2020-10-05	not scaled	2019-10-23

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] : 7d2262f0-ddb5-11f0-547e-e11a7fd54e24 [observed] Occultation Date + Time : 2024-09-29 at 19:36:59 UT +/- 0.01 min [1] Object Designation : (760) Massinga Orbit Class : MBA Star Designation : GDR3 4046849028175183616 Star Coordinates (ICRF) : RA = 18 30 30.4179, DE = -31 20 54.126 [2] Star Magnitudes : G = 11.85 mag, RP = 11.9 mag, BP = 11.82 mag Object Magnitude : V = 13.98 mag Estimated Magnitude Drop : 2.3 mag Estimated Max. Duration : 4.2 sec Object Mean Diameter : 71.3 km (src: astorb) Speed of the shadow : 17.1 km/s Elongation to Moon & Sun : 122° (sunlit = 8%), Sun = 89° Cross-track uncertainty : 1.0 mas = 2 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.72 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#87 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 7d2262f0-ddb5-11f0-547e-e11a7fd54e24 [observed]

 Occultation Date + Time   : 2024-09-29 at 19:36:59 UT +/- 0.01 min  [1]
 Object Designation        : (760) Massinga
 Orbit Class               : MBA
 Star Designation          : GDR3 4046849028175183616
 Star Coordinates (ICRF)   : RA = 18 30 30.4179, DE = -31 20 54.126  [2]
 Star Magnitudes           : G = 11.85 mag, RP = 11.9 mag, BP = 11.82 mag
 Object Magnitude          : V = 13.98 mag
 Estimated Magnitude Drop  : 2.3 mag
 Estimated Max. Duration   : 4.2 sec
 Object Mean Diameter      : 71.3 km  (src: astorb)
 Speed of the shadow       : 17.1 km/s
 Elongation to Moon & Sun  : 122° (sunlit = 8%), Sun = 89°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.72 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#87
 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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