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35028 (1981 ET21)
Classification: Main-belt Asteroid          SPK-ID: 2035028
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2141348791602702 4.1544e-08  
a 2.61922807327473 1.1109e-08 au
q 2.058359986310858 1.094e-07 au
i 4.99005841201016 8.1188e-06 deg
node 166.715213991495 4.2472e-05 deg
peri 299.1429547627076 4.7219e-05 deg
M 136.8176116173059 1.8092e-05 deg
tp 2458412.065799775031
(2018-Oct-20.56579978)
7.7201e-05 TDB
period 1548.311723738598
4.24
9.8503e-06
2.697e-08
d
yr
n .2325113182833322 1.4792e-09 deg/d
Q 3.180096160238601 1.3488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      13957 days (38.21 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:44:59  

Additional Information
 Earth MOID = 1.08054 au 
 Jupiter MOID = 1.98422 au 
 T_jup = 3.367 
[ 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 15.5   n/a MPO431895  
diameter diameter 1.969 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.287   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

35028 (1981 ET21)          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 ET21 = 1998 FV44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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