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JPL Small-Body Database Browser
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4862 Loke (1987 SJ5)
Classification: Main-belt Asteroid          SPK-ID: 2004862
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 .2382203851026426 2.8319e-08  
a 2.916278955568128 1.4583e-08 au
q 2.221561859705957 8.3504e-08 au
i 8.64925906815688 4.9456e-06 deg
node 199.7412696161288 2.2899e-05 deg
peri 100.7987476214738 2.5654e-05 deg
M 171.9017304375089 1.1049e-05 deg
tp 2457731.900109111164
(2016-Dec-09.40010911)
5.5452e-05 TDB
period 1819.039051696195
4.98
1.3644e-05
3.736e-08
d
yr
n .1979066912633413 1.4845e-09 deg/d
Q 3.6109960514303 1.8057e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1853  
   data-arc span      15954 days (43.68 yr)  
   first obs. used      1976-04-02  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47044  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:50:27  

Additional Information
 Earth MOID = 1.22563 au 
 Jupiter MOID = 1.7557 au 
 T_jup = 3.222 
[ 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 12.9   n/a MPO435745  
diameter diameter 6.610 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.336   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4862 Loke (1987 SJ5)          Discovered 1987-Sep-30 by Jensen, P. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 SJ5 = 1976 GW3 = 1981 JZ1 = 1982 SN6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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