Collaborative Occultation Resources and Archive (CORA)

2024-11-02 / UCAC4 566-007588 / (636) Erika

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Eberhard Bredner	O+	VID	M250	DE	GPS	22:56:19	22:56:48.44	22:56:56.12	22:57:10	1.1	1.1	7.68	87.6
2	show	Christian Weber	O+	VID	T203	DE	GPS	22:55:31	22:56:17.9	22:56:25.1	22:57:10	1.1	1.0	7.20	82.1

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#59 : 6a1c8170-860b-11ef-78cd-5160fefe42ce [db: asteroids]

JPL#59 : db7abbd0-8290-11ef-6618-5154efe71cb6 [db: asteroids]

Using prediction 6a1c8170-860b-11ef-78cd-5160fefe42ce 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: 2024-11-02, 22:56 UT (JD = 2460617.456)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 1647	None	14.608	13°, -70°	2.450912e6	9705.5	0.0°	None	None	not scaled	2016-01-12
# 1648	None	14.608	176°, -60°	2.450912e6	9705.5	0.0°	None	None	not scaled	2016-01-12

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] : 6a1c8170-860b-11ef-78cd-5160fefe42ce [asteroids] Occultation Date + Time : 2024-11-02 at 22:54:53 UT +/- 0.0 min [1] Object Designation : (636) Erika Orbit Class : MBA Star Designation : GDR3 0067711503747659008 Star Coordinates (ICRF) : RA = 03 36 59.9453, DE = +23 03 19.492 [2] Star Magnitudes : G = 14.89 mag, RP = 14.21 mag, BP = 15.4 mag Object Magnitude : V = 13.67 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 6.5 sec Object Mean Diameter : 74.3 km (src: astorb) Speed of the shadow : 11.4 km/s Elongation to Moon & Sun : 179° (sunlit = 2%), Sun = 163° Cross-track uncertainty : 1.0 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#59 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] : 6a1c8170-860b-11ef-78cd-5160fefe42ce [asteroids]

 Occultation Date + Time   : 2024-11-02 at 22:54:53 UT +/- 0.0 min  [1]
 Object Designation        : (636) Erika
 Orbit Class               : MBA
 Star Designation          : GDR3 0067711503747659008
 Star Coordinates (ICRF)   : RA = 03 36 59.9453, DE = +23 03 19.492  [2]
 Star Magnitudes           : G = 14.89 mag, RP = 14.21 mag, BP = 15.4 mag
 Object Magnitude          : V = 13.67 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 6.5 sec
 Object Mean Diameter      : 74.3 km  (src: astorb)
 Speed of the shadow       : 11.4 km/s
 Elongation to Moon & Sun  : 179° (sunlit = 2%), Sun = 163°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#59

 Object is a Gaia mass determination target !

 [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

(If error 404: link not valid which means no data available)

Aladin Sky Atlas
03 36 59.945 +23 03 19.49 FoV: 29.96' +– × × Go to:
Aladin Lite direct link (has Gaia overlay)