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2012-11-24 / HIP 28558 / (1309) Hyperborea

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Alberto Ossola O+ VID M230 CH GPS++ 02:26:37 02:29:23.92 02:29:30.24 02:30:30 0.05 0.05 6.32 55.6
2 show Stefano Sposetti O+ VID M400 CH GPS++ 02:26:06 02:29:23.86 02:29:26.46 02:35:01 0.04 0.08 2.60 22.9
3 show Serhiy Vorobyov O+ VIS M200 UA NTP 02:20:23 02:26:52.68 02:26:56.64 02:28:01 3.96 34.8
4 show Jose De Queiroz O- VID M900 CH 02:28:13 02:30:51
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: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#78 : ad5491a9-baeb-465d-b4dc-51c8ef4835ef [db: observed]

Using prediction ad5491a9-baeb-465d-b4dc-51c8ef4835ef 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 = 63 x 45 km
a',b' = 31.7, 22.6 km
X0,Y0 = 1221.7, 23.4 km
Mean diameter = 53 km

From 3 chords (VID,VIS)








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: 2012-11-24, 02:29 UT (JD = 2456255.603)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 45531.013.872 81°, 74° 2.457228e6-972.40.0° None2020-10-05 not scaled 2019-10-23
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] : ad5491a9-baeb-465d-b4dc-51c8ef4835ef [observed]

 Occultation Date + Time   : 2012-11-24 at 02:35:19 UT +/- 0.03 min  [1]
 Object Designation        : (1309) Hyperborea
 Orbit Class               : MBA
 Star Designation          : GDR3 3341910896220673664
 Star Coordinates (ICRF)   : RA = 06 01 39.8184, DE = +10 54 39.541  [2]
 Star Magnitudes           : G = 6.9 mag, RP = 5.34 mag, BP = 10.14 mag
 Object Magnitude          : V = 14.58 mag
 Estimated Magnitude Drop  : 7.7 mag
 Estimated Max. Duration   : 6.5 sec
 Object Mean Diameter      : 57 km  (src: astorb)
 Speed of the shadow       : 8.8 km/s
 Elongation to Moon & Sun  : 79° (sunlit = 83%), Sun = 149°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78

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

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