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160591 (1999 RD81)
Classification: Main-belt Asteroid          SPK-ID: 2160591
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1980541164830018 1.2562e-07  
a 2.548435034236674 1.8901e-08 au
q 2.043706985116601 3.29e-07 au
i 5.751036698754436 8.048e-06 deg
node 17.89735366644071 7.7192e-05 deg
peri 314.6204125913588 7.8286e-05 deg
M 45.07853945134903 1.9368e-05 deg
tp 2458814.430104894855
(2019-Nov-26.93010490)
7.8358e-05 TDB
period 1485.965673536201
4.07
1.6532e-05
4.526e-08
d
yr
n .2422666999724807 2.6953e-09 deg/d
Q 3.053163083356747 2.2645e-08 au
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      8243 days (22.57 yr)  
   first obs. used      1995-09-19  
   last obs. used      2018-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60884  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:13:48  

Additional Information
 Earth MOID = 1.03866 au 
 Jupiter MOID = 2.33336 au 
 T_jup = 3.407 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456458.5 (2013-Jun-15.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1988427727201151 1.2543e-07  
q 2.041611701648973 3.2919e-07 au
tp 2455844.776136733245
(2011-Oct-10.27613673)
5.74e-05 TDB
node 17.96298290934586 7.7096e-05 deg
peri 314.9972694193763 7.8186e-05 deg
i 5.756021518810561 8.0524e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      8243 days (22.57 yr)  
   first obs. used      1995-09-19  
   last obs. used      2018-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60884  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:13:48  

Additional Information
 Jupiter MOID = 2.33336 au 
 T_jup = 3.407 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.573391357207632E-14 -4.126198882492908E-14 -2.465565700554515E-12 1.82060500808103E-13 -3.154289600892544E-13 -5.908640739246904E-14
q -4.126198882492908E-14 1.083635507016747E-13 6.67558679387266E-12 -4.84354467696964E-13 8.924548653743465E-13 1.566698052774005E-13
tp -2.465565700554515E-12 6.67558679387266E-12 3.294711151522501E-9 -2.694599533409259E-11 8.162604677582882E-10 1.420287220440108E-11
node 1.82060500808103E-13 -4.84354467696964E-13 -2.694599533409259E-11 5.94373263801078E-9 -5.915468672495446E-9 -3.63347709067633E-10
peri -3.154289600892544E-13 8.924548653743465E-13 8.162604677582882E-10 -5.915468672495446E-9 6.113067555368495E-9 3.634385502024213E-10
i -5.908640739246904E-14 1.566698052774005E-13 1.420287220440108E-11 -3.63347709067633E-10 3.634385502024213E-10 6.484062692672383E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO436809  

160591 (1999 RD81)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20070828/Numbers.arcLast Updated: 2007-08-30

Alternate Designations
 1999 RD81 = 1995 ST74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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