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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2073894639095423 2.8731e-08  
a 2.683571198332487 1.0203e-08 au
q 2.127026806147225 7.8474e-08 au
i 6.452713259474188 4.0423e-06 deg
node 151.0969896150573 2.8776e-05 deg
peri 262.7386730285627 3.0519e-05 deg
M 341.7211371101169 1.1898e-05 deg
tp 2459082.029501047755
(2020-Aug-20.52950105)
5.3308e-05 TDB
period 1605.713689850849
4.40
9.1571e-06
2.507e-08
d
yr
n .2241993714542221 1.2786e-09 deg/d
Q 3.24011559051775 1.2319e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2325  
   data-arc span      17613 days (48.22 yr)  
   first obs. used      1971-09-16  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4572  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:57:08  

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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