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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2704085670362982 3.7465e-08  
a 3.17013617586426 1.2746e-08 au
q 2.312904195238875 1.2013e-07 au
i 16.86413254891921 4.1173e-06 deg
node 58.88651170682658 1.404e-05 deg
peri 302.1629281844198 1.5375e-05 deg
M 101.7637079068855 7.9943e-06 deg
tp 2458417.718541521882
(2018-Oct-26.21854152)
4.4421e-05 TDB
period 2061.651735843706
5.64
1.2433e-05
3.404e-08
d
yr
n .1746172710652676 1.0531e-09 deg/d
Q 4.027368156489645 1.6192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3768  
   data-arc span      40344 days (110.46 yr)  
   first obs. used      1910-06-03  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:52  

Additional Information
 Earth MOID = 1.36071 au 
 Jupiter MOID = 1.68216 au 
 T_jup = 3.080 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456508.5 (2013-Aug-04.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2638808228397039 3.688e-08  
q 2.338662501434696 1.1677e-07 au
tp 2456345.465294982057
(2013-Feb-21.96529498)
4.3638e-05 TDB
node 59.57681586937531 1.4045e-05 deg
peri 300.8375762298455 1.5557e-05 deg
i 16.8389722711042 4.1098e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3768  
   data-arc span      40344 days (110.46 yr)  
   first obs. used      1910-06-03  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:52  

Additional Information
 Jupiter MOID = 1.68216 au 
 T_jup = 3.080 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.360130171882536E-15 -4.292506940292552E-15 2.091485476099839E-13 4.086403499398648E-16 1.647304114968259E-14 1.747815950970703E-15
q -4.292506940292552E-15 1.363433359784037E-14 -6.116366135861861E-13 1.088538346487688E-15 -4.738437391103613E-14 -3.931702113918375E-15
tp 2.091485476099839E-13 -6.116366135861861E-13 1.904245204406944E-9 -4.307022035169682E-12 3.228086400102037E-10 -3.708226749179261E-12
node 4.086403499398648E-16 1.088538346487688E-15 -4.307022035169682E-12 1.972615430454802E-10 -1.886115108331124E-10 -6.397584378278275E-12
peri 1.647304114968259E-14 -4.738437391103613E-14 3.228086400102037E-10 -1.886115108331124E-10 2.420171905237532E-10 5.583052307060022E-12
i 1.747815950970703E-15 -3.931702113918375E-15 -3.708226749179261E-12 -6.397584378278275E-12 5.583052307060022E-12 1.689016558081348E-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. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2003) Minor Planet Bull. 30, 61-64.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

[ show close-approach data ]
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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