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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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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2071930370830385 2.9463e-08  
a 2.684954371920486 1.0637e-08 au
q 2.128650521172898 8.001e-08 au
i 6.450457455261219 4.0613e-06 deg
node 151.1084312544853 2.97e-05 deg
peri 262.5672379291718 3.1371e-05 deg
M 252.2051883056834 1.1638e-05 deg
tp 2459081.670672229586
(2020-Aug-20.17067223)
5.3373e-05 TDB
period 1606.955281798445
4.40
9.5495e-06
2.615e-08
d
yr
n .224026146886366 1.3313e-09 deg/d
Q 3.241258222668074 1.2841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2216  
   data-arc span      17531 days (48.00 yr)  
   first obs. used      1971-09-16  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46419  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:49:45  

Additional Information
 Earth MOID = 1.15083 au 
 Jupiter MOID = 2.16577 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-January); 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

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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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