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886 Washingtonia (A917 WA)
Classification: Main-belt Asteroid          SPK-ID: 2000886
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2704085670325623 3.7471e-08  
a 3.170136175826238 1.2749e-08 au
q 2.312904195222978 1.2016e-07 au
i 16.86413257103974 4.1222e-06 deg
node 58.88651170184183 1.404e-05 deg
peri 302.1629281891383 1.5378e-05 deg
M 101.7637079209465 7.9954e-06 deg
tp 2458417.718541451842
(2018-Oct-26.21854145)
4.443e-05 TDB
period 2061.651735806615
5.64
1.2437e-05
3.405e-08
d
yr
n .1746172710684092 1.0534e-09 deg/d
Q 4.027368156429498 1.6197e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3760  
   data-arc span      40318 days (110.38 yr)  
   first obs. used      1910-06-03  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32458  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:44  

Additional Information
 Earth MOID = 1.36071 au 
 Jupiter MOID = 1.68216 au 
 T_jup = 3.080 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456502.5 (2013-Jul-29.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2638704070418271 3.6885e-08  
q 2.338653632530284 1.1679e-07 au
tp 2456345.457987436674
(2013-Feb-21.95798744)
4.3658e-05 TDB
node 59.57675859346735 1.4045e-05 deg
peri 300.835526413706 1.556e-05 deg
i 16.83905118836076 4.1146e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3760  
   data-arc span      40318 days (110.38 yr)  
   first obs. used      1910-06-03  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32458  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:24:44  

Additional Information
 Jupiter MOID = 1.68216 au 
 T_jup = 3.080 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.360509479991778E-15 -4.29387996006919E-15 2.100534481168792E-13 3.892816219129598E-16 1.669973539469179E-14 1.74770576891384E-15
q -4.29387996006919E-15 1.363927716002558E-14 -6.144543001439997E-13 1.115124093460916E-15 -4.808801417586265E-14 -3.924397305807231E-15
tp 2.100534481168792E-13 -6.144543001439997E-13 1.906043992086067E-9 -4.322151617677771E-12 3.232478573089425E-10 -3.732134701848026E-12
node 3.892816219129598E-16 1.115124093460916E-15 -4.322151617677771E-12 1.972646335253151E-10 -1.886183971726931E-10 -6.410692421986191E-12
peri 1.669973539469179E-14 -4.808801417586265E-14 3.232478573089425E-10 -1.886183971726931E-10 2.421273097205497E-10 5.590779239867572E-12
i 1.74770576891384E-15 -3.924397305807231E-15 -3.732134701848026E-12 -6.410692421986191E-12 5.590779239867572E-12 1.693000316606675E-11

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 9.3   n/a MPO236394  
diameter diameter 86.793 km 0.857 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.001 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2003) Minor Planet Bull. 30, 61-64.]
geometric albedo albedo 0.078   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B C   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)

886 Washingtonia (A917 WA)          Discovered 1917-Nov-16 by Peters, G. H. at Washington
Independent discovery Nov. 12 by M. Harwood, Nantucket.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A917 WA = 1945 WA = 1952 BN = A910 LA = A916 NA = A917 UD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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