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5287 Heishu (1989 WE)
Classification: Main-belt Asteroid          SPK-ID: 2005287
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2073895179214252 2.8564e-08  
a 2.683571200947578 1.0108e-08 au
q 2.12702666327524 7.8062e-08 au
i 6.452717020977373 4.0006e-06 deg
node 151.0969725318958 2.8614e-05 deg
peri 262.7386983238404 3.0336e-05 deg
M 341.7211306749354 1.1779e-05 deg
tp 2459082.029529869871
(2020-Aug-20.52952987)
5.2777e-05 TDB
period 1605.713692197956
4.40
9.0725e-06
2.484e-08
d
yr
n .2241993711265049 1.2668e-09 deg/d
Q 3.240115738619916 1.2205e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2371  
   data-arc span      17851 days (48.87 yr)  
   first obs. used      1971-09-16  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44989  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:26:13  

Additional Information
 Earth MOID = 1.14969 au 
 Jupiter MOID = 2.1672 au 
 T_jup = 3.335 
[ 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 12.7   n/a MPO347566  
diameter diameter 8.250 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.731 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.259   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5287 Heishu (1989 WE)          Discovered 1989-Nov-20 by Mizuno and Furuta at Kani
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WE = 1942 BG = 1971 SR = 1987 HP1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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