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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2073895171956795 2.8581e-08  
a 2.683571201811076 1.0172e-08 au
q 2.127026665907247 7.8144e-08 au
i 6.452717156086279 4.0086e-06 deg
node 151.0969725214181 2.8616e-05 deg
peri 262.7386991931219 3.0359e-05 deg
M 341.7211294048032 1.1893e-05 deg
tp 2459082.029535574413
(2020-Aug-20.52953557)
5.3289e-05 TDB
period 1605.713692972966
4.40
9.1297e-06
2.5e-08
d
yr
n .2241993710182933 1.2747e-09 deg/d
Q 3.240115737714904 1.2282e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2344  
   data-arc span      17627 days (48.26 yr)  
   first obs. used      1971-09-16  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:34:15  

Additional Information
 Earth MOID = 1.14969 au 
 Jupiter MOID = 2.1672 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456640.5 (2013-Dec-14.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2075313366940086 2.8697e-08  
q 2.127178240745625 7.8568e-08 au
tp 2455862.300481462386
(2011-Oct-27.80048146)
4.5499e-05 TDB
node 151.4198801167178 2.8579e-05 deg
peri 261.3387378220497 3.0329e-05 deg
i 6.455842753360105 4.013e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2344  
   data-arc span      17627 days (48.26 yr)  
   first obs. used      1971-09-16  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:34:15  

Additional Information
 Jupiter MOID = 2.1672 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.23493688369717E-16 -2.242473125150271E-15 -3.081636113777894E-13 8.940943750923473E-16 -6.609742921844041E-14 7.892314531587151E-17
q -2.242473125150271E-15 6.172880565911651E-15 9.284005631390298E-13 -2.775288512275106E-15 2.061751183651746E-13 4.96962314623415E-18
tp -3.081636113777894E-13 9.284005631390298E-13 2.070134827837725E-9 -1.800211653521451E-12 4.708490164258405E-10 1.124122989949352E-12
node 8.940943750923473E-16 -2.775288512275106E-15 -1.800211653521451E-12 8.16754032266021E-10 -8.115370892664702E-10 1.076321322667477E-11
peri -6.609742921844041E-14 2.061751183651746E-13 4.708490164258405E-10 -8.115370892664702E-10 9.198183658435341E-10 -1.044535532272877E-11
i 7.892314531587151E-17 4.96962314623415E-18 1.124122989949352E-12 1.076321322667477E-11 -1.044535532272877E-11 1.610433205257125E-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 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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