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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2026215291075933 5.4187e-08  
a 2.557452301900145 1.0156e-08 au
q 2.039257405869404 1.4331e-07 au
i 9.924205319112973 5.4356e-06 deg
node 306.9057057617022 1.9331e-05 deg
peri 53.55693397331986 2.2827e-05 deg
M 37.52710516583083 1.2422e-05 deg
tp 2458844.777164043755
(2019-Dec-27.27716404)
5.1053e-05 TDB
period 1493.859456958386
4.09
8.8981e-06
2.436e-08
d
yr
n .2409865254211986 1.4354e-09 deg/d
Q 3.075647197930887 1.2213e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1722  
   data-arc span      14212 days (38.91 yr)  
   first obs. used      1981-02-09  
   last obs. used      2020-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46665  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 10:42:38  

Additional Information
 Earth MOID = 1.05237 au 
 Jupiter MOID = 2.43232 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-August); 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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