Cora»Occultation

2022-04-15 / 4UC 621-038470 / (22) Kalliope

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	P. Fini/G. Betti	O+	CCD	M305	IT	GPS+	21:09:06	21:09:23.30	21:09:27.11	21:10:10	0.57	0.57	3.81	92.6
2	show	Alberto Ossola	O+	VID	M230	CH	GPS++	21:07:24	21:09:12.28	21:09:17.08	21:11:00	0.89	0.89	4.80	116.6
3	show	Stefano Sposetti	O+	CCD	M420	CH	GPS++	21:06:00	21:09:11.54	21:09:16.34	21:12:00	0.28	0.28	4.80	116.6
4	show	Arnaud Leroy	O+	CCD	M300	FR	GPS++	21:03:03	21:08:55.57	21:08:58.83	21:07:18	0.16	0.16	3.26	79.2
5	show	Peter Tickner	O+	CCD	M356	UK	GPS+	21:05:30	21:08:41.61	21:08:45.80	21:11:30	0.09	0.08	4.19	101.8
6	show	Peter Birtwhistle	O+	CCD	M405	UK	NTP	21:08:34	21:08:40.57	21:08:44.44	21:08:50	0.38	0.38	3.87	94.0
7	show	Derrick Ward	O+	CCD	M200	UK	NTP	21:06:42	21:08:40.14	21:08:43.52	21:10:42	0.13	0.05	3.38	82.1
8	show	Tim Haymes	O+	CCD	M280	UK	GPS++	21:07:00	21:08:39.15	21:08:43.71	21:11:00	0.10	0.15	4.56	110.8
9	show	Simon Kidd	O+	CCD	M350	UK	GPS++	21:06:42	21:08:41.05	21:08:45.44	21:10:42	0.41	0.41	4.39	106.7
10	show	William Stewart	O+	VID	M279	UK	GPS++	21:06:31	21:08:33.19	21:08:38.04	21:10:36	0.16	0.14	4.85	117.9
11	show	Thierry Midavaine	O-	CCD	M356	FR		21:07:55			21:10:25
12	show	Luke Broom-Lynne	O-	VID	M250	UK		21:08:04			21:09:29
13	show	R. Boninsegna et al	O?	VID	M400	BE	GPS++	21:07:27	21:08:54.28	21:08:55.80	21:10:26	0.36	0.36	1.52	36.9

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

13 observations found in db: euraster

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

JPL#122 : ef566961-4e52-48a2-9f3a-4b7074167eca [db: observed]

JPL#122 : cb1ee237-d7b9-496c-8a8c-d1e10cb40991 [db: observed]

Using prediction ef566961-4e52-48a2-9f3a-4b7074167eca 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 = 188 x 115 km
a',b' = 94.0, 57.5 km
X0,Y0 = -624.8, 25.5 km
Mean diameter = 147 km

From 11 chords (VID,CCD)

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: 2022-04-15, 21:08 UT (JD = 2459685.381)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 121	None	4.148	196°, 3°	2.436258e6	23427.4	0.0°	None	2011-04-11	143.0 +/- 10.0 km	2011-03-28
# 1827	4.0	4.148	196°, 2°	2.436258e6	23427.4	0.0°	None	2017-06-19	157.0 +/- 6.0 km	2017-06-06

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] : ef566961-4e52-48a2-9f3a-4b7074167eca [observed] Occultation Date + Time : 2022-04-15 at 21:06:50 UT +/- 0.0 min [1] Object Designation : (22) Kalliope Orbit Class : MBA Star Designation : GDR3 0939336289966756992 Star Coordinates (ICRF) : RA = 06 53 57.6110, DE = +34 08 34.192 [2] Star Magnitudes : G = 13.42 mag, RP = 12.94 mag, BP = 13.72 mag Object Magnitude : V = 12.2 mag Estimated Magnitude Drop : 0.3 mag Estimated Max. Duration : 7.5 sec Object Mean Diameter : 181 km (src: astorb) Speed of the shadow : 24.3 km/s Elongation to Moon & Sun : 92° (sunlit = 99%), Sun = 76° Cross-track uncertainty : 1.3 mas = 2 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#122 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : ef566961-4e52-48a2-9f3a-4b7074167eca [observed]

 Occultation Date + Time   : 2022-04-15 at 21:06:50 UT +/- 0.0 min  [1]
 Object Designation        : (22) Kalliope
 Orbit Class               : MBA
 Star Designation          : GDR3 0939336289966756992
 Star Coordinates (ICRF)   : RA = 06 53 57.6110, DE = +34 08 34.192  [2]
 Star Magnitudes           : G = 13.42 mag, RP = 12.94 mag, BP = 13.72 mag
 Object Magnitude          : V = 12.2 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 7.5 sec
 Object Mean Diameter      : 181 km  (src: astorb)
 Speed of the shadow       : 24.3 km/s
 Elongation to Moon & Sun  : 92° (sunlit = 99%), Sun = 76°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#122

 
 [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

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Collaborative Occultation Resources and Archive (CORA)

2022-04-15 / 4UC 621-038470 / (22) Kalliope

Sky projection (artificial light) for occ. time: 2022-04-15, 21:08 UT (JD = 2459685.381)