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65638 (1981 DN1)
Classification: Main-belt Asteroid          SPK-ID: 2065638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027487173598926 5.4402e-08  
a 2.558145527740328 1.0362e-08 au
q 2.039484803171031 1.4402e-07 au
i 9.922457067059415 5.4516e-06 deg
node 306.9089822373191 1.9337e-05 deg
peri 53.45874961319277 2.284e-05 deg
M 301.2212481198709 1.2164e-05 deg
tp 2458844.508051266430
(2019-Dec-27.00805127)
5.1276e-05 TDB
period 1494.466888903288
4.09
9.0805e-06
2.486e-08
d
yr
n .2408885755001138 1.4637e-09 deg/d
Q 3.076806252309625 1.2463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1691  
   data-arc span      14180 days (38.82 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4679  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 06:56:53  

Additional Information
 Earth MOID = 1.05164 au 
 Jupiter MOID = 2.42724 au 
 T_jup = 3.387 
[ 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 13.8   n/a MPO436239  
diameter diameter 5.332 km 0.233 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.68373 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.206   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

65638 (1981 DN1)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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