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120530 (1994 PJ21)
Classification: Main-belt Asteroid          SPK-ID: 2120530
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2406880706036187 6.7089e-08  
a 2.349579036482718 1.4624e-08 au
q 1.784063391460983 1.6316e-07 au
i 2.346617613331547 6.9214e-06 deg
node 352.5492025551904 0.00011227 deg
peri 350.5700723939394 0.00011283 deg
M 51.85294900316745 1.2986e-05 deg
tp 2458811.023883484659
(2019-Nov-23.52388348)
4.6203e-05 TDB
period 1315.477774298934
3.60
1.2282e-05
3.363e-08
d
yr
n .2736648288807899 2.555e-09 deg/d
Q 2.915094681504454 1.8144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      365  
   data-arc span      8644 days (23.67 yr)  
   first obs. used      1994-08-12  
   last obs. used      2018-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56665  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:10:55  

Additional Information
 Earth MOID = .776298 au 
 Jupiter MOID = 2.49534 au 
 T_jup = 3.518 
[ 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 16.8   n/a MPO439779  

120530 (1994 PJ21)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1994 PJ21 = 2004 HJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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