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152704 (1998 SD4)
Classification: Mars-crossing Asteroid          SPK-ID: 2152704
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .125317401688538 9.1958e-08  
a 1.514888727860966 4.2402e-09 AU
q 1.325046808638175 1.4074e-07 AU
i 13.67098860681387 1.1911e-05 deg
node 181.808318267906 2.1367e-05 deg
peri 144.1196377997732 4.3338e-05 deg
M 174.7373733102798 3.2554e-05 deg
tp 2456469.938074023356
(2013-Jun-26.43807402)
6.1793e-05 JED
period 681.0351506216147
1.86
2.8593e-06
7.828e-09
d
yr
n .528607076553112 2.2194e-09 deg/d
Q 1.704730647083758 4.7716e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      194  
   data-arc span      5566 days (15.24 yr)  
   first obs. used      1998-09-15  
   last obs. used      2013-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62193  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-21 16:24:51  

Additional Information
 Earth MOID = .334484 AU 
 T_jup = 4.475 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.5 mag n/a MPO280797  

152704 (1998 SD4)          Discovered 1998-Sep-17 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

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