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16868 (1998 AK8)
Classification: Mars-crossing Asteroid          SPK-ID: 2016868
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1821884890379277 7.8662e-08  
a 1.797727225595962 5.1717e-09 au
q 1.470202018662288 1.4007e-07 au
i 48.23457651682882 8.6985e-06 deg
node 126.7826256111436 7.4567e-06 deg
peri 11.90400479685841 2.1756e-05 deg
M 257.1248304072789 2.1396e-05 deg
tp 2459648.089309805825
(2022-Mar-09.58930981)
5.3054e-05 TDB
period 880.4082840268346
2.41
3.7992e-06
1.04e-08
d
yr
n .408901195651434 1.7645e-09 deg/d
Q 2.125252432529636 6.114e-09 au
  Orbit Determination Parameters
   # obs. used (total)      432  
   data-arc span      15741 days (43.10 yr)  
   first obs. used      1977-07-17  
   last obs. used      2020-08-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46215  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:44:18  

Additional Information
 Earth MOID = .490238 au 
 Jupiter MOID = 2.95872 au 
 T_jup = 3.664 
[ 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 16.64   n/a E2021B10  
diameter diameter 1.112 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.327   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

16868 (1998 AK8)          Discovered 1998-Jan-09 by ODAS at Caussols
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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