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39757 (1997 EL28)
Classification: Main-belt Asteroid          SPK-ID: 2039757
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906279318486564 6.9508e-08  
a 2.772044305937004 1.5971e-08 au
q 2.243615232903389 1.8864e-07 au
i 9.422381135580215 6.9425e-06 deg
node 3.780131800049189 2.4921e-05 deg
peri 23.84408703576384 2.8089e-05 deg
M 151.8604716999283 1.5379e-05 deg
tp 2458289.383228149457
(2018-Jun-19.88322815)
6.8744e-05 TDB
period 1685.771386065808
4.62
1.4569e-05
3.989e-08
d
yr
n .2135520883648137 1.8456e-09 deg/d
Q 3.300473378970619 1.9016e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      8453 days (23.14 yr)  
   first obs. used      1997-03-07  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5479  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:46:07  

Additional Information
 Earth MOID = 1.25106 au 
 Jupiter MOID = 2.1845 au 
 T_jup = 3.291 
[ 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 14.9   n/a MPO279917  
diameter diameter 2.943 km 0.582 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.245   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39757 (1997 EL28)          Discovered 1997-Mar-07 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 EL28 = 1999 RG21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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