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300338 (2007 RJ31)
Classification: Main-belt Asteroid          SPK-ID: 2300338
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511124675254145 4.8153e-08  
a 2.41757692451786 2.6043e-08 au
q 2.052250910021463 1.2156e-07 au
i 6.167813023432843 6.012e-06 deg
node 237.4628013354643 4.3708e-05 deg
peri 55.83202817756838 4.8862e-05 deg
M 177.8403972227983 2.7587e-05 deg
tp 2458322.239074081854
(2018-Jul-22.73907408)
9.8174e-05 TDB
period 1372.994759028972
3.76
2.2185e-05
6.074e-08
d
yr
n .2622005638642088 4.2367e-09 deg/d
Q 2.782902939014257 2.9978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      312  
   data-arc span      6541 days (17.91 yr)  
   first obs. used      2002-02-07  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57103  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 06:05:38  

Additional Information
 Earth MOID = 1.0437 au 
 Jupiter MOID = 2.3942 au 
 T_jup = 3.492 
[ 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 16.3   n/a MPO450214  

300338 (2007 RJ31)          Discovered 2007-Sep-05 by CSS at Catalina
Reference: 20111012/Numbers.arcLast Updated: 2011-10-13

[ show close-approach data ]
Alternate Designations
 2007 RJ31 = 2003 ME11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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