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212221 (2005 JU9)
Classification: Main-belt Asteroid          SPK-ID: 2212221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380347844822033 9.2816e-08  
a 2.609272139625851 2.956e-08 au
q 2.249101822177179 2.5167e-07 au
i 5.986055386004437 8.5843e-06 deg
node 34.00750781481053 6.4831e-05 deg
peri 146.1484545673386 7.057e-05 deg
M 232.5604187578503 3.7146e-05 deg
tp 2459545.478447695549
(2021-Nov-26.97844770)
0.00016613 TDB
period 1539.492199033596
4.21
2.6161e-05
7.162e-08
d
yr
n .2338433414771358 3.9738e-09 deg/d
Q 2.969442457074523 3.364e-08 au
  Orbit Determination Parameters
   # obs. used (total)      169  
   data-arc span      9126 days (24.99 yr)  
   first obs. used      1994-10-08  
   last obs. used      2019-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6202  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 23:44:46  

Additional Information
 Earth MOID = 1.2546 au 
 Jupiter MOID = 1.9918 au 
 T_jup = 3.389 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457117.5 (2015-Apr-05.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374279364950348 9.3148e-08  
q 2.251463005460065 2.5253e-07 au
tp 2456467.144564675139
(2013-Jun-23.64456468)
0.00012903 TDB
node 34.02324309383204 6.4799e-05 deg
peri 146.4381795081236 7.0569e-05 deg
i 5.987591114785666 8.587e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      169  
   data-arc span      9126 days (24.99 yr)  
   first obs. used      1994-10-08  
   last obs. used      2019-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6202  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 23:44:46  

Additional Information
 Jupiter MOID = 1.9918 au 
 T_jup = 3.389 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.676568235450862E-15 -2.341478179462427E-14 -3.639028115060189E-12 5.085495730741009E-14 -6.980859660943827E-13 -3.224646494833648E-15
q -2.341478179462427E-14 6.377223544402383E-14 1.153653238455788E-11 -1.476739804680287E-13 2.288769334492793E-12 1.121326650061249E-14
tp -3.639028115060189E-12 1.153653238455788E-11 1.66494041315106E-8 -4.64033670324159E-11 3.65097233970692E-9 1.300067432382335E-11
node 5.085495730741009E-14 -1.476739804680287E-13 -4.64033670324159E-11 4.198925983141644E-9 -4.185939295282016E-9 -2.354470339128812E-10
peri -6.980859660943827E-13 2.288769334492793E-12 3.65097233970692E-9 -4.185939295282016E-9 4.9799726396213E-9 2.371075742137516E-10
i -3.224646494833648E-15 1.121326650061249E-14 1.300067432382335E-11 -2.354470339128812E-10 2.371075742137516E-10 7.373648518014866E-11

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 16.9   n/a MPO494173  

212221 (2005 JU9)          Discovered 2005-May-04 by Veillet, C. at Mauna Kea
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

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