2023-10-11 / TYC 4695-00746-1 / (590) Tomyris

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jiri Polak	O+	VID	M300	CZ	GPS	01:55:27	01:57:27.44	01:57:29.62	01:59:27	0.03	0.03	2.18	25.1
2	show	Michal Rottenborn	O+	VID	M254	CZ	GPS	01:55:27	01:57:27.30	01:57:29.60	01:59:27	0.05	0.05	2.30	26.4
3	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	01:55:55	01:57:26.49	01:57:26.77	01:58:55	0.02	0.02	0.28	3.2
4	show	Rui Goncalves	O-	VID	M256	PT	GPS	01:58:21			02:00:40
5	show	Tomas Janik	O-	CCD	T432	CZ	GPS	1:55:55.			1:58:55.

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

5 observations found in db: sodis

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

JPL#75 : 253ef4a0-ddb4-11f0-547e-272ecfd7aa0f [db: observed]

Using prediction 253ef4a0-ddb4-11f0-547e-272ecfd7aa0f for map and profile fit

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result: Ellipse profile fit was not successful. Trying circular fit. Circular diameter = 29 km From 3 chords (VID) Chords to ignore: Fill: Grid: Show (close) miss chords: 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: 2023-10-11, 01:57 UT (JD = 2460228.581)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 367	2.0	5.552	274°, -30°	2.445323e6	14905.6	0.0°	None	2017-04-03	not scaled	2017-03-31
# 368	2.0	5.552	113°, -35°	2.445323e6	14905.6	0.0°	None	2017-04-03	not scaled	2017-03-31

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

Map with groundtrack and observer stations

Event Details

Occultation UUID [and DB] : 253ef4a0-ddb4-11f0-547e-272ecfd7aa0f [observed] Occultation Date + Time : 2023-10-11 at 02:03:17 UT +/- 0.0 min [1] Object Designation : (590) Tomyris Orbit Class : MBA Star Designation : GDR3 2490981220935629056 Star Coordinates (ICRF) : RA = 02 05 14.3966, DE = -05 10 50.533 [2] Star Magnitudes : G = 11.64 mag, RP = 11.24 mag, BP = 11.88 mag Object Magnitude : V = 14.23 mag Estimated Magnitude Drop : 2.7 mag Estimated Max. Duration : 3.5 sec Object Mean Diameter : 39.9 km (src: astorb) Speed of the shadow : 11.5 km/s Elongation to Moon & Sun : 129° (sunlit = 12%), Sun = 161° Cross-track uncertainty : 0.7 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.84 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#75 Note : FP:true [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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