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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1252660336010609 7.9332e-08  
a 1.514930850219279 3.9278e-09 au
q 1.325161471432427 1.2116e-07 au
i 13.67286661107872 1.0531e-05 deg
node 181.8021745124697 2.02e-05 deg
peri 144.1311808711794 3.9023e-05 deg
M 237.6362438448249 2.9397e-05 deg
tp 2457831.993041260872
(2017-Mar-19.49304126)
5.5619e-05 JED
period 681.0635556841678
1.86
2.6487e-06
7.252e-09
d
yr
n .5285850299805855 2.0557e-09 deg/d
Q 1.704700229006131 4.4198e-09 au
  Orbit Determination Parameters
   # obs. used (total)      193  
   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      .62146  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 09:00:06  

Additional Information
 Earth MOID = .334983 au 
 Jupiter MOID = 3.54724 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
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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