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2025-03-19 / UCAC4 593-023326 / (1356) Nyanza

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Peter Nosal O+ VID M250 SK NTP 21:10:02 21:11:08.230 21:11:12.130 21:12:23 0.1 0.1 3.90 62.8
2 show Peter Nosal, Paula Libic O+ VID M200 SK NTP 21:10:09 21:11:07.250 21:11:11.510 21:12:18 0.13 0.12 4.26 68.6
3 show Marek Harman O+ VID M250 SK NTP 21:09:10 21:11:07.69 21:11:10.81 21:13:18 0.06 0.06 3.12 50.2
4 show Tomas Janik O+ CCD T600 CZ GPS 21:10:12 21:10:47.41 21:10:51.61 21:12:18 0.17 0.18 4.20 67.6
5 show Zdenek Sikac O- VID T150 CZ NTP 21:09:00 21:13:00
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#65 : 98799d10-8713-11ef-78cd-2234eefd7d2d [db: asteroids]

Using prediction 98799d10-8713-11ef-78cd-2234eefd7d2d 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 = 71 x 53 km
a',b' = 35.5, 26.3 km
X0,Y0 = -32.4, 22.6 km
Mean diameter = 61 km

From 4 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.

Sky projection (artificial light) for occ. time: 2025-03-19, 21:11 UT (JD = 2460754.383)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 25971.512.411 327°, -49° 2.451171e69583.40.0° None2018-07-19 not scaled 2018-07-18
# 25981.512.411 149°, -31° 2.451171e69583.40.0° None2018-07-19 not scaled 2018-07-18
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

Occ by (1356) Nyanza on 2025-03-19

Unavailable
300 km

Event Details
 Occultation UUID [and DB] : 98799d10-8713-11ef-78cd-2234eefd7d2d [asteroids]

 Occultation Date + Time   : 2025-03-19 at 21:07:11 UT +/- 0.0 min  [1]
 Object Designation        : (1356) Nyanza
 Orbit Class               : MBA
 Star Designation          : GDR3 3443176226376667136
 Star Coordinates (ICRF)   : RA = 05 51 46.5922, DE = +28 31 11.006  [2]
 Star Magnitudes           : G = 14.32 mag, RP = 13.93 mag, BP = 14.54 mag
 Object Magnitude          : V = 16.08 mag
 Estimated Magnitude Drop  : 2.0 mag
 Estimated Max. Duration   : 4.0 sec
 Object Mean Diameter      : 64.7 km  (src: astorb)
 Speed of the shadow       : 16.1 km/s
 Elongation to Moon & Sun  : 152° (sunlit = 74%), Sun = 89°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#65

 
 [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
05 51 46.592 +28 31 11.01
FoV: 29.96'
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