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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 
[ 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 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-Oct-06 12:02 00:04 Jupiter 1.9847352325251 1.9847345348242 1.9847359302278 2.72017365382214 2.55847760766646 2429543.001352877 3.56794648017614 328.134700668108 21.3445209876226 -87.544324523772 1336540.2184952 T 10 CATAB v2.0f-lin.ifort 2019-Nov-07 23:44:47 2019-Nov-07 23:45
2070-Aug-27 06:33 00:03 Jupiter 1.99935418873509 1.99935338005812 1.99935499741172 2.84070655058982 2.68743699350658 2477350.773036798 2.62951417383848 164.787014674393 24.9231120485892 -87.3262423505699 1324340.15930305 T 10 CATAB v2.0f-lin.ifort 2019-Nov-07 23:44:47 2019-Nov-07 23:45
2129-Jun-27 10:07 00:05 Jupiter 1.9829764695322 1.98297573401234 1.98297720505861 2.71411981247282 2.55189190408116 2498838.921384772 5.43114247709644 437.534190217002 21.1845899429673 -86.6254303003433 1316786.94175755 T 10 CATAB v2.0f-lin.ifort 2019-Nov-07 23:44:47 2019-Nov-07 23:45
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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