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JPL Small-Body Database Browser
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668 Dora (A908 OH)
Classification: Main-belt Asteroid          SPK-ID: 2000668
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2357306422510307 3.3369e-08  
a 2.792565447510919 1.1177e-08 au
q 2.134272201041133 9.302e-08 au
i 6.843624190705635 4.0352e-06 deg
node 214.4501235317629 3.0131e-05 deg
peri 113.1607625546559 3.1146e-05 deg
M 233.9697280951941 8.6828e-06 deg
tp 2459197.227207295775
(2020-Dec-13.72720730)
4.3096e-05 TDB
period 1704.525360293913
4.67
1.0233e-05
2.802e-08
d
yr
n .2112024897874941 1.2679e-09 deg/d
Q 3.450858693980706 1.3811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2206  
   data-arc span      40465 days (110.79 yr)  
   first obs. used      1908-07-27  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4273  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:11:49  

Additional Information
 Earth MOID = 1.13368 au 
 Jupiter MOID = 1.98325 au 
 T_jup = 3.277 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.0   n/a MPO435701  
diameter diameter 21.517 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 22.914 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Durkee, R.I.; Martinez, L. (2011) Minor Planet Bull. 39, 11.]
geometric albedo albedo 0.042   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Ch   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)

668 Dora (A908 OH)          Discovered 1908-Jul-27 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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