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85856 (1999 AT19)
Classification: Main-belt Asteroid          SPK-ID: 2085856
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1870187766146693 5.5481e-08  
a 2.275834093641986 8.8601e-09 au
q 1.850210385671107 1.244e-07 au
i 5.01096877457399 4.6589e-06 deg
node 318.5924873834501 5.4852e-05 deg
peri 36.4437650533442 5.6315e-05 deg
M 205.1957139790987 1.4689e-05 deg
tp 2459539.749567646913
(2021-Nov-21.24956765)
5.2588e-05 TDB
period 1254.034040935261
3.43
7.3232e-06
2.005e-08
d
yr
n .2870735468484662 1.6764e-09 deg/d
Q 2.701457801612865 1.0517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      10224 days (27.99 yr)  
   first obs. used      1992-02-01  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56084  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:40:01  

Additional Information
 Earth MOID = .847875 au 
 Jupiter MOID = 2.74221 au 
 T_jup = 3.581 
[ 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 15.6   n/a MPO453289  
diameter diameter 3.216 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.110   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85856 (1999 AT19)          Discovered 1999-Jan-13 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1999 AT19 = 2001 XS17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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