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39492 (1981 EO10)
Classification: Main-belt Asteroid          SPK-ID: 2039492
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08644104027535895 5.0124e-08  
a 2.609552011233586 1.4895e-08 au
q 2.3839796207299 1.2897e-07 au
i 14.42109282007051 5.643e-06 deg
node 196.0478557309165 1.7484e-05 deg
peri 193.8019866132155 3.142e-05 deg
M 156.2262989871043 2.806e-05 deg
tp 2457932.311485329636
(2017-Jun-27.81148533)
0.00011813 TDB
period 1539.739895529287
4.22
1.3183e-05
3.609e-08
d
yr
n .2338057233207234 2.0018e-09 deg/d
Q 2.835124401737272 1.6182e-08 au
  Orbit Determination Parameters
   # obs. used (total)      896  
   data-arc span      13967 days (38.24 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56041  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:06:58  

Additional Information
 Earth MOID = 1.389 au 
 Jupiter MOID = 2.56646 au 
 T_jup = 3.361 
[ 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 14.7   n/a MPO337578  
diameter diameter 3.414 km 0.782 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.986 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.240   0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39492 (1981 EO10)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EO10 = 1998 HM20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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