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2020-02-02 / 4UC 481-021366 / (238) Hypatia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Luca Buzzi O+ CCD M840 IT NTP 01:19:55 01:20:04.2 01:20:20.1 01:20:55 0.8 0.5 15.90 139.9
2 show Alberto Ossola O+ VID M230 CH GPS++ 01:18:55 01:20:05.06 01:20:19.90 01:21:56 0.16 0.36 14.84 130.6
3 show Andrea Manna O+ VID M200 CH GPS++ 01:17:18 01:20:07.45 01:20:22.01 01:22:10 0.16 0.32 14.56 128.1
4 show Stefano Sposetti O+ VID M200 CH GPS++ 01:19:00 01:20:08.11 01:20:22.19 01:21:56 0.32 0.32 14.08 123.9
5 show Guy Brabant O- VID M203 FR 01:15:54 01:25:08
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#108 : 3c14c0b6-a055-4c83-aec8-34ee4ab20f53 [db: observed]

Using prediction 3c14c0b6-a055-4c83-aec8-34ee4ab20f53 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 164 km

From 4 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: 2020-02-02, 01:19 UT (JD = 2458881.555)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 38441.08.873 261°, 45° 2.450996e67885.60.0° None2019-09-26 not scaled 2019-05-07
# 38451.08.873 84°, 20° 2.450996e67885.60.0° None2019-09-26 not scaled 2019-05-07
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] : 3c14c0b6-a055-4c83-aec8-34ee4ab20f53 [observed]

 Occultation Date + Time   : 2020-02-02 at 01:20:54 UT +/- 0.03 min  [1]
 Object Designation        : (238) Hypatia
 Orbit Class               : MBA
 Star Designation          : GDR3 3132057797707213952
 Star Coordinates (ICRF)   : RA = 06 29 53.7555, DE = +06 02 29.567  [2]
 Star Magnitudes           : G = 12.81 mag, RP = 11.94 mag, BP = 13.59 mag
 Object Magnitude          : V = 12.59 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 17.0 sec
 Object Mean Diameter      : 149 km  (src: astorb)
 Speed of the shadow       : 8.8 km/s
 Elongation to Moon & Sun  : 56° (sunlit = 50%), Sun = 142°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.18 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#108

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
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