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48399 (1981 EA21)
Classification: Main-belt Asteroid          SPK-ID: 2048399
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04220216860069279 3.6816e-08  
a 2.808698453335244 1.303e-08 au
q 2.690165287659085 1.0029e-07 au
i .8195947834461389 3.719e-06 deg
node 314.7508256190836 0.00023551 deg
peri 219.201814612998 0.00023884 deg
M 124.2756209976827 4.0287e-05 deg
tp 2458406.974283837192
(2018-Oct-15.47428384)
0.0001918 TDB
period 1719.317562875787
4.71
1.1964e-05
3.276e-08
d
yr
n .2093854025418388 1.457e-09 deg/d
Q 2.927231619011403 1.358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      14498 days (39.69 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52398  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:37:36  

Additional Information
 Earth MOID = 1.69445 au 
 Jupiter MOID = 2.03596 au 
 T_jup = 3.321 
[ 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 14.9   n/a MPO257193  

48399 (1981 EA21)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EA21 = 2000 GQ29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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