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3307 Athabasca (1981 DE1)
Classification: Main-belt Asteroid          SPK-ID: 2003307
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09607607336307333 6.9446e-08  
a 2.259201890546156 1.1639e-08 au
q 2.04214664396805 1.5785e-07 au
i 6.372689834088361 5.3978e-06 deg
node 263.1870661975189 6.6831e-05 deg
peri 145.9868551125024 7.4359e-05 deg
M 274.075305911326 3.3556e-05 deg
tp 2457896.537334315008
0.00011636 JED
period 1240.312130101035
n .2902495196678231 2.243e-09 deg/d
Q 2.476257137124263 1.2757e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      14027 days (38.40 yr)  
   first obs. used      1977-01-13  
   last obs. used      2015-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50539  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:45:24  

Additional Information
 Earth MOID = 1.05484 au 
 Jupiter MOID = 2.82271 au 
 T_jup = 3.607 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO279549  
diameter diameter 11 km n/a DASTCOM value unverified
rotation period rot_per 4.902 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Hasegawa, S.; Miyasaka, S.; Yoshizumi, C.; Sekiguchi, T.; et al. (2012) arXiv:1204.0548.]
geometric albedo albedo 0.0441   0.014 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 2: from the PDS IMPS singleton file
SMASSII spectral type spec_B V   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3307 Athabasca (1981 DE1)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 DE1 = 1977 AS = 2003 WM33 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-01 13:40 UT
(server date/time)  
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