Collaborative Occultation Resources and Archive (CORA)

2025-02-15 / TYC 0645-00271-1 / (19) Fortuna

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	CCD	M200	ES	NTP	19:13:46	19:15:51.64	19:15:59.60	19:17:46	0.04	0.04	7.96	226.1
2	show	Deborah Smith	O+	CCD	M280	ES	NTP	19:13:58	19:15:50.75	19:15:58.12	19:17:58	0.05	0.05	7.37	209.3
3	show	Wolfgang Beisker	O-	VID	M360	PT	GPS	19:14:36			19:15:27

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

3 observations found in db: sodis

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

JPL#160 : 1265a870-84f9-11ef-78cd-2fee7d63fd9a [db: asteroids]

Using prediction 1265a870-84f9-11ef-78cd-2fee7d63fd9a 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 = 494.7, 22.1 km
Circular diameter = 224 km

From 2 chords (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: 2025-02-15, 19:15 UT (JD = 2460722.302)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 117	None	7.443	98°, 57°	2.43884125586e6	21881.0	0.0°	confirmed by HST and occultation timings, size from AO is 187+/-13 km	2013-07-24	210.0 +/- 12.0 km	2009-04-15
# 1803	4.0	7.443	97°, 69°	2.43884125586e6	21881.0	0.0°	None	2017-06-19	212.0 +/- 4.0 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] : 1265a870-84f9-11ef-78cd-2fee7d63fd9a [asteroids] Occultation Date + Time : 2025-02-15 at 19:13:52 UT +/- 0.0 min [1] Object Designation : (19) Fortuna Orbit Class : MBA Star Designation : GDR3 0075035208964911488 Star Coordinates (ICRF) : RA = 02 33 43.5830, DE = +14 07 39.470 [2] Star Magnitudes : G = 11.83 mag, RP = 11.3 mag, BP = 12.19 mag Object Magnitude : V = 12.07 mag Estimated Magnitude Drop : 0.9 mag Estimated Max. Duration : 3.8 sec Object Mean Diameter : 108.5 km (src: astorb) Speed of the shadow : 28.4 km/s Elongation to Moon & Sun : 143° (sunlit = 90%), Sun = 73° Cross-track uncertainty : 1.3 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#160 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] : 1265a870-84f9-11ef-78cd-2fee7d63fd9a [asteroids]

 Occultation Date + Time   : 2025-02-15 at 19:13:52 UT +/- 0.0 min  [1]
 Object Designation        : (19) Fortuna
 Orbit Class               : MBA
 Star Designation          : GDR3 0075035208964911488
 Star Coordinates (ICRF)   : RA = 02 33 43.5830, DE = +14 07 39.470  [2]
 Star Magnitudes           : G = 11.83 mag, RP = 11.3 mag, BP = 12.19 mag
 Object Magnitude          : V = 12.07 mag
 Estimated Magnitude Drop  : 0.9 mag
 Estimated Max. Duration   : 3.8 sec
 Object Mean Diameter      : 108.5 km  (src: astorb)
 Speed of the shadow       : 28.4 km/s
 Elongation to Moon & Sun  : 143° (sunlit = 90%), Sun = 73°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#160

 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
02 33 43.583 +14 07 39.47 FoV: 29.96' +– × × Go to:
Aladin Lite direct link (has Gaia overlay)