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17876 (1999 AX21)
Classification: Main-belt Asteroid          SPK-ID: 2017876
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06914685338792234 3.6138e-08  
a 2.313829121960233 9.0309e-09 au
q 2.153835118899344 8.4094e-08 au
i 4.480046600357899 3.7187e-06 deg
node 278.5267105954941 5.4509e-05 deg
peri 325.40296318853 6.1958e-05 deg
M 172.5077023617798 2.9837e-05 deg
tp 2457984.470739298135
(2017-Aug-18.97073930)
0.00010654 TDB
period 1285.568880788746
3.52
7.5264e-06
2.061e-08
d
yr
n .2800316695431568 1.6394e-09 deg/d
Q 2.473823125021122 9.6553e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1616  
   data-arc span      17783 days (48.69 yr)  
   first obs. used      1971-02-18  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51001  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:10:44  

Additional Information
 Earth MOID = 1.14177 au 
 Jupiter MOID = 2.53983 au 
 T_jup = 3.575 
[ 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 14.5   n/a MPO347664  
diameter diameter 7.910 km 0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17876 (1999 AX21)          Discovered 1999-Jan-15 by Korlevic, K. at Visnjan
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 AX21 = 1971 DR1 = 1978 EA8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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