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85850 (1999 AR2)
Classification: Main-belt Asteroid          SPK-ID: 2085850
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291198131267485 4.4185e-08  
a 2.426435215281956 1.0995e-08 au
q 2.113134353720588 1.0713e-07 au
i 5.69320230127699 5.0263e-06 deg
node 49.48821185455167 6.072e-05 deg
peri 55.0063283475853 6.5831e-05 deg
M 259.554325068699 2.4896e-05 deg
tp 2459385.694624602469
(2021-Jun-20.19462460)
9.5854e-05 TDB
period 1380.547892696536
3.78
9.384e-06
2.569e-08
d
yr
n .2607660349231602 1.7725e-09 deg/d
Q 2.739736076843325 1.2415e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1042  
   data-arc span      7491 days (20.51 yr)  
   first obs. used      1998-11-25  
   last obs. used      2019-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:39:59  

Additional Information
 Earth MOID = 1.13594 au 
 Jupiter MOID = 2.39732 au 
 T_jup = 3.492 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO395767  
diameter diameter 2.716 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.380   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85850 (1999 AR2)          Discovered 1999-Jan-09 by Kobayashi, T. at Oizumi
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1999 AR2 = 2001 SN48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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