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101984 (1999 RB61)
Classification: Main-belt Asteroid          SPK-ID: 2101984
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .084813238782342 6.7565e-08  
a 2.774891044065487 1.764e-08 au
q 2.539543547350179 1.8301e-07 au
i 3.304668251474128 4.8226e-06 deg
node 121.6099365274344 9.691e-05 deg
peri 219.9121127258822 0.00010112 deg
M 167.452951295071 3.1427e-05 deg
tp 2458215.160149906829
(2018-Apr-06.66014991)
0.00014549 TDB
period 1688.368845380055
4.62
1.61e-05
4.408e-08
d
yr
n .2132235506388791 2.0332e-09 deg/d
Q 3.010238540780796 1.9136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      7531 days (20.62 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 18:04:13  

Additional Information
 Earth MOID = 1.53199 au 
 Jupiter MOID = 2.30745 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457158.5 (2015-May-16.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08384502488337618 6.7116e-08  
q 2.543360433695684 1.8123e-07 au
tp 2456517.412604813254
(2013-Aug-12.91260481)
0.00014546 TDB
node 121.6789599177946 9.672e-05 deg
peri 218.2242901564272 0.00010114 deg
i 3.306465670365537 4.8275e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      7531 days (20.62 yr)  
   first obs. used      1999-09-07  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56982  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 18:04:13  

Additional Information
 Jupiter MOID = 2.30745 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.504622362899342E-15 -1.212025209753581E-14 4.341920067949918E-12 -1.245797351540216E-14 7.962377850250406E-13 -2.795603872822289E-15
q -1.212025209753581E-14 3.284521576648002E-14 -1.164607269420249E-11 3.361089581766887E-14 -2.117510987569437E-12 7.619939319733433E-15
tp 4.341920067949918E-12 -1.164607269420249E-11 2.115873497597817E-8 -3.219120526901656E-11 4.339506568835536E-9 -6.089221697607061E-12
node -1.245797351540216E-14 3.361089581766887E-14 -3.219120526901656E-11 9.354725590499199E-9 -9.345215732606583E-9 1.255152411203945E-10
peri 7.962377850250406E-13 -2.117510987569437E-12 4.339506568835536E-9 -9.345215732606583E-9 1.022925383334928E-8 -1.265016324854348E-10
i -2.795603872822289E-15 7.619939319733433E-15 -6.089221697607061E-12 1.255152411203945E-10 -1.265016324854348E-10 2.330473261618323E-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 15.5   n/a MPO351573  

101984 (1999 RB61)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 RB61 = 2002 CN103 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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