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16866 (1998 AR)
Classification: Main-belt Asteroid          SPK-ID: 2016866
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09922798808746421 1.7527e-08  
a 2.389674610652647 7.8595e-09 au
q 2.152552006853891 4.312e-08 au
i 4.021466405240806 5.5937e-07 deg
node 341.2022677403017 9.396e-06 deg
peri 133.0190061809786 1.184e-05 deg
M 85.48063807527815 5.9192e-06 deg
tp 2458880.115250295586
(2020-Jan-31.61525030)
2.1966e-05 TDB
period 1349.293974525749
3.69
6.6566e-06
1.822e-08
d
yr
n .2668062014629045 1.3163e-09 deg/d
Q 2.626797214451404 8.6394e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2352  
   data-arc span      12933 days (35.41 yr)  
   first obs. used      1985-09-20  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43685  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:44:48  

Additional Information
 Earth MOID = 1.17113 au 
 Jupiter MOID = 2.44043 au 
 T_jup = 3.523 
[ 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 13.76   n/a E2021B10  

16866 (1998 AR)          Discovered 1998-Jan-05 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 AR = 1985 SM4 = 1989 UK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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