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74615 (1999 RT21)
Classification: Main-belt Asteroid          SPK-ID: 2074615
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1986084898253941 4.6451e-08  
a 2.411603845175015 1.0027e-08 au
q 1.932638847427691 1.1138e-07 au
i 2.269447762297708 3.0981e-06 deg
node 99.51544647017801 0.00011454 deg
peri 246.4798107557021 0.00011481 deg
M 196.6958930713729 9.484e-06 deg
tp 2459621.014571572347
(2022-Feb-10.51457157)
3.8264e-05 TDB
period 1367.909539860357
3.75
8.5315e-06
2.336e-08
d
yr
n .2631752974226283 1.6414e-09 deg/d
Q 2.890568842922338 1.2019e-08 au
  Orbit Determination Parameters
   # obs. used (total)      721  
   data-arc span      9533 days (26.10 yr)  
   first obs. used      1994-03-13  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5348  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:07:16  

Additional Information
 Earth MOID = .92682 au 
 Jupiter MOID = 2.52396 au 
 T_jup = 3.491 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457215.5 (2015-Jul-12.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .198836303009532 4.6601e-08  
q 1.931963370157202 1.1178e-07 au
tp 2456881.909372160189
(2014-Aug-12.40937216)
3.0685e-05 TDB
node 99.59163908229954 0.00011448 deg
peri 245.8758982838692 0.00011474 deg
i 2.269996877048825 3.0999e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      721  
   data-arc span      9533 days (26.10 yr)  
   first obs. used      1994-03-13  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5348  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:07:16  

Additional Information
 Jupiter MOID = 2.52396 au 
 T_jup = 3.491 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.171673926443115E-15 -5.195949785514755E-15 4.678682441452469E-13 -1.158207083436754E-14 7.750486579061905E-14 -2.060408787708095E-15
q -5.195949785514755E-15 1.249542487398136E-14 -1.074124063715717E-12 2.788677757148343E-14 -1.70850492838637E-13 4.959469871461053E-15
tp 4.678682441452469E-13 -1.074124063715717E-12 9.415608170620643E-10 -3.902520543812331E-12 2.617402649404101E-10 -7.828585665988971E-13
node -1.158207083436754E-14 2.788677757148343E-14 -3.902520543812331E-12 1.3104921210042E-8 -1.309548372325186E-8 3.137293049155974E-11
peri 7.750486579061905E-14 -1.70850492838637E-13 2.617402649404101E-10 -1.309548372325186E-8 1.316560883269978E-8 -3.150823988029754E-11
i -2.060408787708095E-15 4.959469871461053E-15 -7.828585665988971E-13 3.137293049155974E-11 -3.150823988029754E-11 9.609549608163225E-12

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 16.2   n/a MPO468693  

74615 (1999 RT21)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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