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JPL Small-Body Database Browser
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154815 (2004 QE4)
Classification: Main-belt Asteroid          SPK-ID: 2154815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08102274830877644 3.9889e-08  
a 2.800436013698594 2.3661e-08 au
q 2.57353699140586 1.1217e-07 au
i 4.600545663309173 4.3016e-06 deg
node 83.1216881939761 6.4528e-05 deg
peri 227.4135459479725 7.186e-05 deg
M 172.72429971111 3.0905e-05 deg
tp 2458179.226428016739
(2018-Mar-01.72642802)
0.00014833 TDB
period 1711.736486461242
4.69
2.1694e-05
5.939e-08
d
yr
n .2103127454765224 2.6654e-09 deg/d
Q 3.027335035991328 2.5578e-08 au
  Orbit Determination Parameters
   # obs. used (total)      428  
   data-arc span      7918 days (21.68 yr)  
   first obs. used      1998-05-01  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58786  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 20:05:37  

Additional Information
 Earth MOID = 1.56168 au 
 Jupiter MOID = 2.16184 au 
 T_jup = 3.316 
[ 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 15.6   n/a MPO320649  

154815 (2004 QE4)          Discovered 2004-Aug-19 by Siding Spring Survey at Siding Spring
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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