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100551 (1997 EM42)
Classification: Main-belt Asteroid          SPK-ID: 2100551
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02709855753924227 6.1338e-08  
a 3.080546279056109 2.9689e-08 au
q 2.997067918460808 1.9529e-07 au
i 9.271865013794029 6.4993e-06 deg
node 323.7864488054452 3.4843e-05 deg
peri 6.742373490839407 0.00011192 deg
M 291.7143486950964 0.00010853 deg
tp 2459375.099323317789
(2021-Jun-09.59932332)
0.000597 TDB
period 1974.876915096804
5.41
2.8549e-05
7.816e-08
d
yr
n .1822898415835468 2.6352e-09 deg/d
Q 3.164024639651409 3.0493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      575  
   data-arc span      10340 days (28.31 yr)  
   first obs. used      1991-01-11  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60489  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:34:36  

Additional Information
 Earth MOID = 1.98556 au 
 Jupiter MOID = 2.00317 au 
 T_jup = 3.207 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO395887  
diameter diameter 4.646 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100551 (1997 EM42)          Discovered 1997-Mar-10 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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