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21657 (1999 PZ1)
Classification: Main-belt Asteroid          SPK-ID: 2021657
[ 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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05285120260663666 2.4798e-08  
a 2.295275899126374 6.3816e-09 au
q 2.173967807543515 5.8156e-08 au
i 7.288492552199732 3.1062e-06 deg
node 151.7745199490046 2.3992e-05 deg
peri 333.9755588732664 4.2551e-05 deg
M 263.1268452105058 3.5551e-05 deg
tp 2459542.283989001366
(2021-Nov-23.78398900)		 0.00012596 TDB
period 1270.137597024305
3.48		 5.2971e-06
1.45e-08		 d
yr
n .2834338585389588 1.1821e-09 deg/d
Q 2.416583990709231 6.7189e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1889  
   data-arc span      11389 days (31.18 yr)  
   first obs. used      1989-11-06  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47519  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:50  

Additional Information
 Earth MOID = 1.19066 au 
 Jupiter MOID = 2.5928 au 
 T_jup = 3.583 
[ 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 15.05   n/a E2021B10  

21657 (1999 PZ1)          Discovered 1999-Aug-10 by Broughton, J. at Reedy Creek
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 PZ1 = 1989 VL4 = 1989 XG1 = 1998 HG111 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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