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21658 (1999 PA2)
Classification: Main-belt Asteroid          SPK-ID: 2021658
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .154547186428316 2.6387e-08  
a 2.156420815802874 7.0892e-09 au
q 1.823152045965086 5.531e-08 au
i 2.523130926758464 4.6956e-06 deg
node 3.910084624976995 6.3836e-05 deg
peri 261.6704409818706 6.6349e-05 deg
M 318.7702823917652 2.0378e-05 deg
tp 2459332.966651834223
(2021-Apr-28.46665183)		 6.5778e-05 TDB
period 1156.641311819114
3.17		 5.7037e-06
1.562e-08		 d
yr
n .311246015788428 1.5348e-09 deg/d
Q 2.489689585640662 8.1848e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1388  
   data-arc span      10278 days (28.14 yr)  
   first obs. used      1992-03-26  
   last obs. used      2020-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49931  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:41  

Additional Information
 Earth MOID = .807732 au 
 Jupiter MOID = 2.58575 au 
 T_jup = 3.684 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.59   n/a E2021B10  

21658 (1999 PA2)          Discovered 1999-Aug-10 by Broughton, J. at Reedy Creek
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 PA2 = 1996 TQ3 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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