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JPL Small-Body Database Browser
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35012 (1981 EU2)
Classification: Main-belt Asteroid          SPK-ID: 2035012
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09267864934917132 5.4046e-08  
a 3.06848306332639 2.9351e-08 au
q 2.784100197466492 1.7387e-07 au
i 11.1459015840459 5.9139e-06 deg
node 315.5694596956114 2.4628e-05 deg
peri 5.346979785370292 3.5637e-05 deg
M 329.4787913473587 2.5936e-05 deg
tp 2459166.949789298272
(2020-Nov-13.44978930)
0.00014177 TDB
period 1963.28804764395
5.38
2.8169e-05
7.712e-08
d
yr
n .1833658593460186 2.6309e-09 deg/d
Q 3.352865929186287 3.2071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      13976 days (38.26 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54391  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:53:08  

Additional Information
 Earth MOID = 1.77133 au 
 Jupiter MOID = 1.94746 au 
 T_jup = 3.196 
[ 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 14.4   n/a MPO436009  
diameter diameter 4.363 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 40.311 h n/a LCDB (Rev. 2019-August); 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 0.122   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

35012 (1981 EU2)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EU2 = 1999 RF153 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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