Cora»Occultation

2024-09-07 / TYC 1283-00171-1 / (69) Hesperia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Juris Sennikovs	O+	VID	M154	LV	GPS	23:37:44	23:38:18.72	23:38:20.80	23:38:50	0.13	0.05	2.08	42.4
2	show	Michele Turchenko	O+	VID	M150	RU	GPS	23:37:01	23:38:31.40	23:38:37.49	23:40:00	0.04	0.02	6.09	124.2
3	show	Anton Zhdanov	O+	VID	M150	RU	GPS	23:37:06	23:38:31.48	23:38:37.73	23:39:51	0.05	0.05	6.25	127.5
4	show	Ingvars Tomsons	O-	CCD	M150	LV	GPS	23:38:09	23:38:20.610	23:38:20.870	23:38:30			0.26

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#156 : 5a662cb0-ddb5-11f0-547e-8cc6792b81c4 [db: observed]

Using prediction 5a662cb0-ddb5-11f0-547e-8cc6792b81c4 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 = 135 x 91 km
a',b' = 67.7, 45.7 km
X0,Y0 = -661.6, 18.0 km
Mean diameter = 111 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: 2024-09-07, 23:37 UT (JD = 2460561.484)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 319	None	5.655	250°, 17°	2.44338e6	17181.5	0.0°	None	2013-07-24	109.0 +/- 11.0 km	2011-04-21
# 320	None	5.655	71°, -2°	2.44338e6	17181.5	0.0°	None	2013-07-24	109.0 +/- 11.0 km	2011-04-21

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] : 5a662cb0-ddb5-11f0-547e-8cc6792b81c4 [observed] Occultation Date + Time : 2024-09-07 at 23:41:36 UT +/- 0.01 min [1] Object Designation : (69) Hesperia Orbit Class : MBA Star Designation : GDR3 3393812002577253504 Star Coordinates (ICRF) : RA = 05 13 37.1180, DE = +15 53 06.544 [2] Star Magnitudes : G = 11.01 mag, RP = 10.53 mag, BP = 11.33 mag Object Magnitude : V = 12.34 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 6.8 sec Object Mean Diameter : 138.1 km (src: astorb) Speed of the shadow : 20.4 km/s Elongation to Moon & Sun : 139° (sunlit = 20%), Sun = 87° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.84 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#156 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 5a662cb0-ddb5-11f0-547e-8cc6792b81c4 [observed]

 Occultation Date + Time   : 2024-09-07 at 23:41:36 UT +/- 0.01 min  [1]
 Object Designation        : (69) Hesperia
 Orbit Class               : MBA
 Star Designation          : GDR3 3393812002577253504
 Star Coordinates (ICRF)   : RA = 05 13 37.1180, DE = +15 53 06.544  [2]
 Star Magnitudes           : G = 11.01 mag, RP = 10.53 mag, BP = 11.33 mag
 Object Magnitude          : V = 12.34 mag
 Estimated Magnitude Drop  : 1.6 mag
 Estimated Max. Duration   : 6.8 sec
 Object Mean Diameter      : 138.1 km  (src: astorb)
 Speed of the shadow       : 20.4 km/s
 Elongation to Moon & Sun  : 139° (sunlit = 20%), Sun = 87°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.84 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#156
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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