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39512 (1985 TA1)
Classification: Main-belt Asteroid          SPK-ID: 2039512
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2308513217910954 4.1044e-08  
a 2.359196036646097 7.8746e-09 au
q 1.814572513222032 9.5968e-08 au
i 2.047359877287113 4.4188e-06 deg
node 197.176559409751 8.7766e-05 deg
peri 176.8112762759156 8.8045e-05 deg
M 202.4643517581371 7.4634e-06 deg
tp 2459579.689680519604
(2021-Dec-31.18968052)
2.9147e-05 TDB
period 1323.562554342854
3.62
6.6268e-06
1.814e-08
d
yr
n .2719931890024943 1.3618e-09 deg/d
Q 2.903819560070162 9.6925e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      12612 days (34.53 yr)  
   first obs. used      1985-10-15  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:42  

Additional Information
 Earth MOID = .815345 au 
 Jupiter MOID = 2.56093 au 
 T_jup = 3.515 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456626.5 (2013-Nov-30.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2295576699044833 4.0859e-08  
q 1.818593309086255 9.5447e-08 au
tp 2456929.695756775049
(2014-Sep-29.19575677)
2.3666e-05 TDB
node 197.269036064061 8.8096e-05 deg
peri 176.3917109794093 8.8375e-05 deg
i 2.041005247127885 4.4133e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      12612 days (34.53 yr)  
   first obs. used      1985-10-15  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:42  

Additional Information
 Jupiter MOID = 2.56093 au 
 T_jup = 3.515 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.669473439387969E-15 -3.892192148550572E-15 8.030577071419697E-14 3.764680499548107E-16 5.20468105652463E-15 -3.856776660162265E-16
q -3.892192148550572E-15 9.110196005657375E-15 -1.579705136367218E-13 -1.400292225539469E-15 -6.744060354290505E-15 9.181723780124762E-16
tp 8.030577071419697E-14 -1.579705136367218E-13 5.600812168099548E-10 -3.121905630409313E-12 1.717764219745243E-10 -1.471421566057476E-13
node 3.764680499548107E-16 -1.400292225539469E-15 -3.121905630409313E-12 7.760876496730815E-9 -7.756250233229887E-9 5.363987404563913E-12
peri 5.20468105652463E-15 -6.744060354290505E-15 1.717764219745243E-10 -7.756250233229887E-9 7.810100260454903E-9 -5.40866334399081E-12
i -3.856776660162265E-16 9.181723780124762E-16 -1.471421566057476E-13 5.363987404563913E-12 -5.40866334399081E-12 1.947713587841994E-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 15.1   n/a MPO309459  
diameter diameter 2.294 km 0.334 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.368   0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39512 (1985 TA1)          Discovered 1985-Oct-15 by Bowell, E. at Anderson Mesa
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1985 TA1 = 2001 AZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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