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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05294184371675737 2.4629e-08  
a 2.2955474429999 6.3535e-09 au
q 2.174016929028197 5.7764e-08 au
i 7.288459758807279 3.0914e-06 deg
node 151.7730001993401 2.3985e-05 deg
peri 333.8772302686322 4.2488e-05 deg
M 318.7814048150331 3.5572e-05 deg
tp 2459541.951606228563
(2021-Nov-23.45160623)		 0.00012576 TDB
period 1270.363000177654
3.48		 5.274e-06
1.444e-08		 d
yr
n .2833835682790319 1.1765e-09 deg/d
Q 2.417077956971603 6.6898e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1909  
   data-arc span      11420 days (31.27 yr)  
   first obs. used      1989-11-06  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47559  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:26  

Additional Information
 Earth MOID = 1.19142 au 
 Jupiter MOID = 2.5919 au 
 T_jup = 3.583 
[ 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 15.05   n/a E2021B10  

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

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