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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291198047876829 4.1038e-08  
a 2.426435211056339 1.0007e-08 au
q 2.113134370274784 1.0068e-07 au
i 5.693202024419505 4.9719e-06 deg
node 49.48820456203459 5.7676e-05 deg
peri 55.00633697949505 6.2918e-05 deg
M 259.5543262670649 2.45e-05 deg
tp 2459385.694619000689
(2021-Jun-20.19461900)
9.42e-05 TDB
period 1380.547889090216
3.78
8.5406e-06
2.338e-08
d
yr
n .2607660356043431 1.6132e-09 deg/d
Q 2.739736051837893 1.1299e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1142  
   data-arc span      7971 days (21.82 yr)  
   first obs. used      1998-11-25  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54107  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:10:38  

Additional Information
 Earth MOID = 1.13594 au 
 Jupiter MOID = 2.39732 au 
 T_jup = 3.492 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456341.5 (2013-Feb-18.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286505456299553 4.0624e-08  
q 2.114491114399609 9.9574e-08 au
tp 2456621.280735898503
(2013-Nov-24.78073590)
9.4414e-05 TDB
node 49.57810531062339 5.7527e-05 deg
peri 54.55734624083952 6.2901e-05 deg
i 5.701235418291137 4.9793e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1142  
   data-arc span      7971 days (21.82 yr)  
   first obs. used      1998-11-25  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54107  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:10:38  

Additional Information
 Jupiter MOID = 2.39732 au 
 T_jup = 3.492 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.650332741081607E-15 -4.029832971391575E-15 1.292105247859282E-12 2.408877296641517E-14 3.521406639355485E-13 -3.065256360777934E-15
q -4.029832971391575E-15 9.914936187189066E-15 -3.176440197311671E-12 -5.999112452573134E-14 -8.708374001904179E-13 7.735148927790364E-15
tp 1.292105247859282E-12 -3.176440197311671E-12 8.913948984406869E-9 6.775191561466151E-11 2.439251806619543E-9 -5.461823044167652E-12
node 2.408877296641517E-14 -5.999112452573134E-14 6.775191561466151E-11 3.309369839016676E-9 -3.273523039722711E-9 -1.055524217202316E-10
peri 3.521406639355485E-13 -8.708374001904179E-13 2.439251806619543E-9 -3.273523039722711E-9 3.956489682064214E-9 1.035232483034856E-10
i -3.065256360777934E-15 7.735148927790364E-15 -5.461823044167652E-12 -1.055524217202316E-10 1.035232483034856E-10 2.479348423885957E-11

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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