Cora»Occultation

2023-04-09 / UCAC4 408-057811 / (439) Ohio

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Andreas Schweizer	O+	VID	L107	CH	GPS	20:10:33	20:11:09.324	20:11:10.589	20:11:33	0.069	0.069	1.27	19.3
2	show	Karl-Ludwig Bath	O+	CCD	T180	DE	NTP	20:08:01	20:11:09.990	20:11:14.392	20:14:01	0.20	0.20	4.40	66.9

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#119 : 8ad36680-ddb3-11f0-547e-3d41cdcf6782 [db: observed]

Using prediction 8ad36680-ddb3-11f0-547e-3d41cdcf6782 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:
X0,Y0 = -1021.5, 15.6 km
Circular diameter = 73 km

From 2 chords (CCD,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: 2023-04-09, 20:11 UT (JD = 2460044.341)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 2253	1.5	37.467	39°, -54°	2.451054e6	8990.3	0.0°	None	2018-07-19	not scaled	2018-07-18
# 2254	1.5	37.468	260°, -30°	2.451054e6	8990.3	0.0°	None	2018-07-19	not scaled	2018-07-18

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] : 8ad36680-ddb3-11f0-547e-3d41cdcf6782 [observed] Occultation Date + Time : 2023-04-09 at 20:04:47 UT +/- 0.0 min [1] Object Designation : (439) Ohio Orbit Class : MBA Star Designation : GDR3 3624828427888712448 Star Coordinates (ICRF) : RA = 13 13 22.7951, DE = -08 35 24.842 [2] Star Magnitudes : G = 11.44 mag, RP = 10.77 mag, BP = 11.96 mag Object Magnitude : V = 14.16 mag Estimated Magnitude Drop : 2.8 mag Estimated Max. Duration : 5.0 sec Object Mean Diameter : 76.6 km (src: astorb) Speed of the shadow : 15.2 km/s Elongation to Moon & Sun : 44° (sunlit = 86%), Sun = 179° Cross-track uncertainty : 0.4 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.18 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#119 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 8ad36680-ddb3-11f0-547e-3d41cdcf6782 [observed]

 Occultation Date + Time   : 2023-04-09 at 20:04:47 UT +/- 0.0 min  [1]
 Object Designation        : (439) Ohio
 Orbit Class               : MBA
 Star Designation          : GDR3 3624828427888712448
 Star Coordinates (ICRF)   : RA = 13 13 22.7951, DE = -08 35 24.842  [2]
 Star Magnitudes           : G = 11.44 mag, RP = 10.77 mag, BP = 11.96 mag
 Object Magnitude          : V = 14.16 mag
 Estimated Magnitude Drop  : 2.8 mag
 Estimated Max. Duration   : 5.0 sec
 Object Mean Diameter      : 76.6 km  (src: astorb)
 Speed of the shadow       : 15.2 km/s
 Elongation to Moon & Sun  : 44° (sunlit = 86%), Sun = 179°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.18 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#119
 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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