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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1870187856580368 5.3971e-08  
a 2.275834095147785 8.5384e-09 au
q 1.850210366314089 1.2136e-07 au
i 5.010967841699798 4.4006e-06 deg
node 318.5925019573686 5.0897e-05 deg
peri 36.44374707317813 5.2248e-05 deg
M 205.1957155743097 1.4453e-05 deg
tp 2459539.749562625300
(2021-Nov-21.24956263)
5.1929e-05 TDB
period 1254.034042179853
3.43
7.0572e-06
1.932e-08
d
yr
n .2870735465635542 1.6155e-09 deg/d
Q 2.70145782398148 1.0135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      931  
   data-arc span      10314 days (28.24 yr)  
   first obs. used      1992-02-01  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55869  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:40:35  

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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