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JPL Small-Body Database Browser
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312965 (1998 EW9)
Classification: Main-belt Asteroid          SPK-ID: 2312965
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .236966639802742 6.8373e-08  
a 2.308248725238997 8.6814e-09 au
q 1.761270780990149 1.5826e-07 au
i 4.822934468730636 5.7983e-06 deg
node 156.4286553275273 5.4309e-05 deg
peri 347.0107112174035 5.8505e-05 deg
M 29.06416932828343 1.7724e-05 deg
tp 2458497.086378367862
(2019-Jan-13.58637837)
6.3003e-05 TDB
period 1280.920963784115
3.51
7.2264e-06
1.978e-08
d
yr
n .2810477852876129 1.5855e-09 deg/d
Q 2.855226669487845 1.0739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      344  
   data-arc span      7760 days (21.25 yr)  
   first obs. used      1998-02-28  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63281  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:35  

Additional Information
 Earth MOID = .774517 au 
 Jupiter MOID = 2.1673 au 
 T_jup = 3.544 
[ 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 17.4   n/a MPO418616  

312965 (1998 EW9)          Discovered 1998-Mar-05 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

Alternate Designations
 1998 EW9 = 2005 ES33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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