Collaborative Occultation Resources and Archive (CORA)


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

2012-01-13 / TYC 2866-01813-1 / (426) Hippo

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show C. Schnabel/J. Juan O+ VID M115 ES GPS++ 22:55:01 22:59:22.77 22:59:33.40 23:04:40 0.04 0.04 10.63 111.6
2 show Antoni Selva O+ VID M150 ES GPS++ 22:59:00 22:59:20.98 22:59:31.90 23:01:20 0.12 0.12 10.92 114.7
3 show Joan Rovira O+ VID M200 ES GPS++ 22:56:20 22:59:20.91 22:59:31.87 23:04:10 0.04 0.04 10.96 115.1
4 show E. Frappa et al O+ VID L61 FR GPS++ 22:54:30 22:58:41.71 22:58:47.79 23:02:34 0.08 0.08 6.08 63.8
5 show Peter Lindner O+ VID M305 DE GPS++ 22:51:20 22:57:15.40 22:57:22.03 23:00:38 0.04 0.04 6.63 69.6
6 show O. Canales/F. Campos O- VID M203 ES 22:58:03 23:01:00
7 show Wolfgang Rothe O- VID M200 DE 22:53:48 23:01:04
8 show G. Wortmann et al O- VID M500 DE 22:55:30 22:58:30
9 show Dieter Ewald O- VIS L127 DE 22:55:30 22:59:30
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

9 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#129 : cb5952dc-3a86-4324-9952-a0053e2444d1 [db: observed]

Using prediction cb5952dc-3a86-4324-9952-a0053e2444d1 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 = 125 x 97 km
a',b' = 62.5, 48.5 km
X0,Y0 = -3256.5, 27.7 km
Mean diameter = 110 km

From 5 chords (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: 2012-01-13, 22:59 UT (JD = 2455940.458)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 34921.067.504 319°, -66° 2.450868e65072.50.0° None2019-09-26 not scaled 2019-05-07
# 34931.067.503 14°, -57° 2.450868e65072.50.0° 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] : cb5952dc-3a86-4324-9952-a0053e2444d1 [observed]

 Occultation Date + Time   : 2012-01-13 at 23:01:12 UT +/- 0.38 min  [1]
 Object Designation        : (426) Hippo
 Orbit Class               : MBA
 Star Designation          : GDR3 0237088486871104384
 Star Coordinates (ICRF)   : RA = 03 38 56.1991, DE = +41 06 57.875  [2]
 Star Magnitudes           : G = 8.99 mag, RP = 8.26 mag, BP = 9.57 mag
 Object Magnitude          : V = 13.48 mag
 Estimated Magnitude Drop  : 4.5 mag
 Estimated Max. Duration   : 12.2 sec
 Object Mean Diameter      : 127 km  (src: astorb)
 Speed of the shadow       : 10.5 km/s
 Elongation to Moon & Sun  : 110° (sunlit = 76%), Sun = 126°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.03 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
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)