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74171 (1998 RA6)
Classification: Main-belt Asteroid          SPK-ID: 2074171
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2490080843135318 3.5897e-08  
a 2.688407723500297 1.3751e-08 au
q 2.018972466417785 9.4766e-08 au
i 4.009650569043029 5.1145e-06 deg
node 40.01988955126845 5.01e-05 deg
peri 313.5837447281628 5.1082e-05 deg
M 331.59361810442 1.2208e-05 deg
tp 2459127.544114086705
(2020-Oct-05.04411409)
5.5314e-05 TDB
period 1610.056544312331
4.41
1.2353e-05
3.382e-08
d
yr
n .2235946316741063 1.7155e-09 deg/d
Q 3.357842980582809 1.7175e-08 au
  Orbit Determination Parameters
   # obs. used (total)      877  
   data-arc span      8431 days (23.08 yr)  
   first obs. used      1997-05-06  
   last obs. used      2020-06-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54274  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:48:58  

Additional Information
 Earth MOID = 1.01669 au 
 Jupiter MOID = 2.08925 au 
 T_jup = 3.324 
[ 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 14.7   n/a MPO436302  

74171 (1998 RA6)          Discovered 1998-Sep-13 by LONEOS at Anderson Mesa
Reference: 20040415/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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