Collaborative Occultation Resources and Archive (CORA)

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

2023-12-18 / UCAC4 598-042472 / (2260) Neoptolemus

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Martin Gutekunst O+ CCD L280 DE GPS 02:25:56 02:26:35.388 02:26:39.439 02:26:56 0.05 0.05 4.05 61.6
2 show Gregor Krannich O+ VID M350 DE GPS 02:25:10 02:26:37.502 02:26:42.371 02:28:21 0.143 0.143 4.87 74.0
3 show Roland BONINSEGNA O- VID M400 BE GPS 2:26:11. 2:28:11.
4 show Olivier Schreurs, Manon Lecossois O- VID M410 BE GPS 02:26:07 02:28:08
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#62 : d1eeb99e-3352-40d9-80a5-2b77f6cc3a62 [db: observed]

Using prediction d1eeb99e-3352-40d9-80a5-2b77f6cc3a62 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 = -1385.4, 47.1 km
Circular diameter = 106 km

From 2 chords (CCD,VID)








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.

Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : d1eeb99e-3352-40d9-80a5-2b77f6cc3a62 [observed]

 Occultation Date + Time   : 2023-12-18 at 02:26:33 UT +/- 0.08 min  [1]
 Object Designation        : (2260) Neoptolemus
 Orbit Class               : JTRO
 Star Designation          : GDR3 0878852086603897856
 Star Coordinates (ICRF)   : RA = 07 45 51.7961, DE = +29 24 32.001  [2]
 Star Magnitudes           : G = 14.37 mag, RP = 13.97 mag, BP = 14.6 mag
 Object Magnitude          : V = 16.49 mag
 Estimated Magnitude Drop  : 2.3 mag
 Estimated Max. Duration   : 4.7 sec
 Object Mean Diameter      : 72 km  (src: astorb)
 Speed of the shadow       : 15.2 km/s
 Elongation to Moon & Sun  : 139° (sunlit = 31%), Sun = 152°
 Cross-track uncertainty   : 2.0 mas = 6 km = 0.08 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62

 
 [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
Aladin Lite direct link (has Gaia overlay)