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5649 Donnashirley (1990 WZ2)
Classification: Mars-crossing Asteroid          SPK-ID: 2005649
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3363379759247633 3.6181e-08  
a 2.281326906696154 1.1527e-08 au
q 1.514030032475268 8.259e-08 au
i 21.72203015597778 8.3762e-06 deg
node 3.397667493492575 1.0326e-05 deg
peri 62.55808655546821 1.6825e-05 deg
M 250.6154316736854 1.452e-05 deg
tp 2459582.913545827778
(2022-Jan-03.41354583)
5.2629e-05 TDB
period 1258.576768226647
3.45
9.5393e-06
2.612e-08
d
yr
n .286037378957221 2.168e-09 deg/d
Q 3.04862378091704 1.5405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      936  
   data-arc span      16069 days (43.99 yr)  
   first obs. used      1975-06-08  
   last obs. used      2019-06-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:41:51  

Additional Information
 Earth MOID = .62433 au 
 Jupiter MOID = 2.68377 au 
 T_jup = 3.439 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO381304  
diameter diameter 2.600 km 0.549 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.380   0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B S   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)

5649 Donnashirley (1990 WZ2)          Discovered 1990-Nov-18 by Helin, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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