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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2407454655413601 5.8965e-08  
a 2.350006499406858 1.2057e-08 au
q 1.784253090681932 1.4199e-07 au
i 2.346648587824312 6.0851e-06 deg
node 352.5444924885373 0.00010845 deg
peri 350.6130167337874 0.00010896 deg
M 106.5313368492213 1.2668e-05 deg
tp 2458811.117079479435
(2019-Nov-23.61707948)
4.4085e-05 TDB
period 1315.836781301296
3.60
1.0127e-05
2.773e-08
d
yr
n .2735901633969968 2.1056e-09 deg/d
Q 2.915759908131784 1.496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      410  
   data-arc span      9656 days (26.44 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54703  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:16  

Additional Information
 Earth MOID = .774672 au 
 Jupiter MOID = 2.49531 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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