Collaborative Occultation Resources and Archive (CORA)

2024-08-28 / UCAC4 411-136606 / (644) Cosima

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Dimitrios Athanasopoulos, Sophia Derlopa	O+	CCD	T1200	GR	NTP	21:09:11	21:12:06.076	21:12:07.757	21:14:11	0.1	0.1	1.68	13.9
2	show	Dimitrios Athanasopoulos, Sophia Derlopa	O+	CCD	T1200	GR	NTP	21:09:11	21:12:06.521	21:12:08.561	21:14:12	0.25	0.25	2.04	16.9

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#69 : 72269510-860e-11ef-78cd-129eb7db67a8 [db: asteroids]

Using prediction 72269510-860e-11ef-78cd-129eb7db67a8 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:
Circular profile fit was not successful ...

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: 2024-08-28, 21:11 UT (JD = 2460551.383)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 893	None	7.557	100°, -30°	2.445736e6	14815.4	0.0°	None	None	not scaled	2016-01-04
# 894	None	7.557	278°, -31°	2.445736e6	14815.4	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] : 72269510-860e-11ef-78cd-129eb7db67a8 [asteroids] Occultation Date + Time : 2024-08-28 at 21:11:42 UT +/- 0.01 min [1] Object Designation : (644) Cosima Orbit Class : MBA Star Designation : GDR3 2610435771949962880 Star Coordinates (ICRF) : RA = 22 59 31.8471, DE = -07 59 59.126 [2] Star Magnitudes : G = 14.66 mag, RP = 14.17 mag, BP = 14.99 mag Object Magnitude : V = 13.43 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 2.4 sec Object Mean Diameter : 19.9 km (src: astorb) Speed of the shadow : 8.3 km/s Elongation to Moon & Sun : 114° (sunlit = 25%), Sun = 173° Cross-track uncertainty : 1.3 mas = 1 km = 0.06 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#69 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 72269510-860e-11ef-78cd-129eb7db67a8 [asteroids]

 Occultation Date + Time   : 2024-08-28 at 21:11:42 UT +/- 0.01 min  [1]
 Object Designation        : (644) Cosima
 Orbit Class               : MBA
 Star Designation          : GDR3 2610435771949962880
 Star Coordinates (ICRF)   : RA = 22 59 31.8471, DE = -07 59 59.126  [2]
 Star Magnitudes           : G = 14.66 mag, RP = 14.17 mag, BP = 14.99 mag
 Object Magnitude          : V = 13.43 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 2.4 sec
 Object Mean Diameter      : 19.9 km  (src: astorb)
 Speed of the shadow       : 8.3 km/s
 Elongation to Moon & Sun  : 114° (sunlit = 25%), Sun = 173°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.06 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#69

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

More Data and Informations

SiMDA \| 3D Asteroid Catalogue \| Johnston Archive \| Star at CDS (Vizier) \| JPL Small-Body Node \| Minor Planet Center \| Wikipedia

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Aladin Sky Atlas
22 59 31.847 -07 59 59.13 FoV: 29.96' +– × × Go to:
Aladin Lite direct link (has Gaia overlay)