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27031 (1998 RO4)
Classification: Amor [NEO]          SPK-ID: 2027031
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 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4255076241689574 4.5613e-08  
a 2.139731536251268 4.3349e-09 au
q 1.229259453901598 9.7218e-08 au
i 5.354786570047132 5.6221e-06 deg
node 191.8833919950804 5.8383e-05 deg
peri 111.7654982826635 5.9083e-05 deg
M 358.8663487015565 1.0344e-05 deg
tp 2459004.100098199998
(2020-Jun-03.60009820)
3.2858e-05 TDB
period 1143.239860245134
3.13
3.4742e-06
9.512e-09
d
yr
n .3148945488331807 9.5692e-10 deg/d
Q 3.050203618600939 6.1794e-09 au
  Orbit Determination Parameters
   # obs. used (total)      245  
   data-arc span      25172 days (68.92 yr)  
   first obs. used      1951-08-26  
   last obs. used      2020-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-27 06:31:46  

Additional Information
 Earth MOID = .234811 au 
 Jupiter MOID = 2.25292 au 
 T_jup = 3.587 
[ 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 17.7   n/a MPO435951  

27031 (1998 RO4)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20010804/Numbers.arcLast Updated: 2004-04-19

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