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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1819395137207265 7.866e-08  
a 1.79821475506524 5.1982e-09 au
q 1.471048436963235 1.4005e-07 au
i 48.2355456342141 8.7019e-06 deg
node 126.7838934702371 7.4561e-06 deg
peri 11.83233568667929 2.1788e-05 deg
M 177.0773551894194 2.1202e-05 deg
tp 2458767.267241246511
(2019-Oct-10.76724125)
5.0669e-05 TDB
period 880.7664479990788
2.41
3.8191e-06
1.046e-08
d
yr
n .4087349158427258 1.7723e-09 deg/d
Q 2.125381073167246 6.1439e-09 au
  Orbit Determination Parameters
   # obs. used (total)      431  
   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      .45351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:44:52  

Additional Information
 Earth MOID = .490413 au 
 Jupiter MOID = 2.95854 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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