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123927 (2001 ER4)
Classification: Main-belt Asteroid          SPK-ID: 2123927
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808977138943929 4.2643e-08  
a 3.024020955486384 2.2962e-08 au
q 2.47698247787016 1.2824e-07 au
i 3.101465962072652 3.9999e-06 deg
node 100.2117310011437 0.00011141 deg
peri 140.9488318177991 0.00011225 deg
M 183.5735894095729 1.5242e-05 deg
tp 2459941.818770960971
(2022-Dec-28.31877096)
8.5072e-05 TDB
period 1920.771138583357
5.26
2.1877e-05
5.99e-08
d
yr
n .187424723731279 2.1347e-09 deg/d
Q 3.571059433102608 2.7116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      443  
   data-arc span      9919 days (27.16 yr)  
   first obs. used      1992-09-28  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58981  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 11:27:56  

Additional Information
 Earth MOID = 1.46531 au 
 Jupiter MOID = 1.44848 au 
 T_jup = 3.218 
[ 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 15.2   n/a MPO449715  
diameter diameter 5.340 km 1.336 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

123927 (2001 ER4)          Discovered 2001-Mar-02 by LONEOS at Anderson Mesa
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 2001 ER4 = 2002 NZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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