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65639 (1981 DS2)
Classification: Main-belt Asteroid          SPK-ID: 2065639
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07785698999875051 4.6498e-08  
a 2.584624869570182 1.1526e-08 au
q 2.383393756949535 1.1731e-07 au
i 10.37155335590559 4.2097e-06 deg
node 290.5322418784545 2.8568e-05 deg
peri 27.95477437493698 4.184e-05 deg
M 24.50369233737398 3.1417e-05 deg
tp 2458897.194430717465
(2020-Feb-17.69443072)
0.00013227 TDB
period 1517.730651759332
4.16
1.0152e-05
2.779e-08
d
yr
n .2371962374105662 1.5866e-09 deg/d
Q 2.78585598219083 1.2423e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1709  
   data-arc span      14512 days (39.73 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42484  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:21:20  

Additional Information
 Earth MOID = 1.37402 au 
 Jupiter MOID = 2.44163 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457040.5 (2015-Jan-18.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07849765552140538 4.6548e-08  
q 2.381704710958418 1.1765e-07 au
tp 2457383.566913189082
(2015-Dec-27.06691319)
0.00012877 TDB
node 290.5812976550733 2.86e-05 deg
peri 29.06507341759596 4.1636e-05 deg
i 10.36556088050265 4.2071e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1709  
   data-arc span      14512 days (39.73 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42484  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:21:20  

Additional Information
 Jupiter MOID = 2.44163 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.166670964260364E-15 -5.456507525251153E-15 2.024234612213723E-12 -1.408022982615225E-14 4.248458079953638E-13 -3.135672009196441E-15
q -5.456507525251153E-15 1.384225475233836E-14 -5.02644346938401E-12 3.590873917222245E-14 -1.058509340311716E-12 7.671999702649899E-15
tp 2.024234612213723E-12 -5.02644346938401E-12 1.658052750310811E-8 -5.492505056484554E-11 3.928686897606949E-9 -1.795516997168836E-11
node -1.408022982615225E-14 3.590873917222245E-14 -5.492505056484554E-11 8.179604313288657E-10 -8.167050092246524E-10 2.667982422822705E-11
peri 4.248458079953638E-13 -1.058509340311716E-12 3.928686897606949E-9 -8.167050092246524E-10 1.733595139389596E-9 -3.035884384824197E-11
i -3.135672009196441E-15 7.671999702649899E-15 -1.795516997168836E-11 2.667982422822705E-11 -3.035884384824197E-11 1.769962237821798E-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 14.1   n/a MPO259753  
diameter diameter 4.543 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.236   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

65639 (1981 DS2)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 DS2 = 1999 RY196 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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