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27996 (1997 WJ5)
Classification: Main-belt Asteroid          SPK-ID: 2027996
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1705051961288622 4.6447e-08  
a 3.162488470811418 2.3649e-08 au
q 2.623267753840452 1.4755e-07 au
i 1.694736893168754 4.345e-06 deg
node 151.8603914088677 0.00017437 deg
peri 91.97873662964179 0.00017505 deg
M 168.4964522216422 2.0778e-05 deg
tp 2458039.042451452547
(2017-Oct-12.54245145)
0.00011186 TDB
period 2054.195877203316
5.62
2.3042e-05
6.309e-08
d
yr
n .1752510576012458 1.9658e-09 deg/d
Q 3.701709187782384 2.7682e-08 au
  Orbit Determination Parameters
   # obs. used (total)      928  
   data-arc span      10287 days (28.16 yr)  
   first obs. used      1991-09-29  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56771  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 01:10:17  

Additional Information
 Earth MOID = 1.61092 au 
 Jupiter MOID = 1.32172 au 
 T_jup = 3.181 
[ 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 14.5   n/a MPO412385  
diameter diameter 7.398 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27996 (1997 WJ5)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 WJ5 = 2000 EV41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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