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18217 (5021 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2018217
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1726305165730942 3.1382e-08  
a 2.356289599590243 9.1333e-09 au
q 1.94952210881717 7.2776e-08 au
i 9.777272998936485 4.1657e-06 deg
node 210.8305151632063 2.0506e-05 deg
peri 90.83440996246402 2.3808e-05 deg
M 280.3510019643776 1.342e-05 deg
tp 2459492.793557065048
(2021-Oct-05.29355707)
5.0083e-05 TDB
period 1321.1174420092
3.62
7.6813e-06
2.103e-08
d
yr
n .2724965915615343 1.5844e-09 deg/d
Q 2.763057090363315 1.071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1473  
   data-arc span      22056 days (60.39 yr)  
   first obs. used      1960-10-17  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:16  

Additional Information
 Earth MOID = .962467 au 
 Jupiter MOID = 2.50588 au 
 T_jup = 3.515 
[ 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 14.57   n/a E2021B10  
diameter diameter 2.710 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.166   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18217 (5021 P-L)          Discovered 1960-Oct-17 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 5021 P-L = 1999 JB65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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