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85639 (1998 OU)
Classification: Main-belt Asteroid          SPK-ID: 2085639
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2261359704956111 4.0638e-08  
a 2.307210275607449 8.9246e-09 au
q 1.785467040795512 9.5774e-08 au
i 3.019794011804572 4.2363e-06 deg
node 198.4916860663258 8.5477e-05 deg
peri 196.5946739579245 8.5977e-05 deg
M 266.6042712659518 9.8476e-06 deg
tp 2458932.588401017569
(2020-Mar-24.08840102)
3.56e-05 TDB
period 1280.056657695323
3.50
7.4272e-06
2.033e-08
d
yr
n .2812375513503924 1.6318e-09 deg/d
Q 2.828953510419387 1.0943e-08 au
  Orbit Determination Parameters
   # obs. used (total)      642  
   data-arc span      7774 days (21.28 yr)  
   first obs. used      1998-07-20  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56794  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:13:10  

Additional Information
 Earth MOID = .791724 au 
 Jupiter MOID = 2.59976 au 
 T_jup = 3.551 
[ 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 16.0   n/a MPO417414  
diameter diameter 1.537 km 0.463 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.358   0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85639 (1998 OU)          Discovered 1998-Jul-20 by ODAS at Caussols
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 OU = 2000 DO39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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