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2022-03-23 / 4UC 611-022384 / (426) Hippo

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Erich Kowald O+ CCD M500 AT GPS++ 20:46:00 20:47:55.54 20:48:00.42 20:48:09 0.30 0.30 4.88 106.4
2 show Bjoern Kattentidt O+ VID M279 DE GPS++ 20:45:38 20:47:43.8 20:47:49.2 20:49:52 0.5 0.5 5.40 117.7
3 show Jiri Polak O+ CCD M303 CZ GPS++ 20:45:44 20:47:41.78 20:47:45.61 20:49:44 0.23 0.30 3.83 83.5
4 show Michal Rottenborn O+ CCD M254 CZ GPS++ 20:45:43 20:47:41.94 20:47:45.94 20:49:43 0.40 0.40 4.00 87.2
5 show Jiri Kubanek O- CCD M303 CZ 20:45:44 20:49:47
6 show Karel Halir O- VID M507 CZ 20:45:44 20:49:44
7 show Jan Manek O- CCD M356 CZ 20:45:45 20:49:45
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

7 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#129 : 46ccafc9-97e4-4910-9c6b-4a20db4efe75 [db: observed]

Using prediction 46ccafc9-97e4-4910-9c6b-4a20db4efe75 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 = 139 x 125 km
a',b' = 69.4, 62.5 km
X0,Y0 = -1604.3, 16.6 km
Mean diameter = 132 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: 2022-03-23, 20:47 UT (JD = 2459662.366)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 34921.067.504 319°, -66° 2.450868e68794.40.0° None2019-09-26 not scaled 2019-05-07
# 34931.067.503 14°, -57° 2.450868e68794.40.0° 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] : 46ccafc9-97e4-4910-9c6b-4a20db4efe75 [observed]

 Occultation Date + Time   : 2022-03-23 at 20:46:02 UT +/- 0.01 min  [1]
 Object Designation        : (426) Hippo
 Orbit Class               : MBA
 Star Designation          : GDR3 3448679552654414080
 Star Coordinates (ICRF)   : RA = 05 34 18.2511, DE = +32 07 45.134  [2]
 Star Magnitudes           : G = 15.14 mag, RP = 14.2 mag, BP = 15.51 mag
 Object Magnitude          : V = 13.99 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 5.8 sec
 Object Mean Diameter      : 127 km  (src: astorb)
 Speed of the shadow       : 21.8 km/s
 Elongation to Moon & Sun  : 168° (sunlit = 66%), Sun = 81°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 6.48 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#129

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

More Data and Informations
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