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3528 Counselman (1981 EW3)
Classification: Main-belt Asteroid          SPK-ID: 2003528
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1581650409557967 1.8256e-08  
a 2.535466784048166 9.9799e-09 au
q 2.134444576307126 4.5982e-08 au
i 7.462438633344625 5.1878e-07 deg
node 276.6535240845349 2.9562e-06 deg
peri 32.28501966503873 5.6339e-06 deg
M 189.7670355456468 5.606e-06 deg
tp 2459897.810935954365
(2022-Nov-14.31093595)
2.6066e-05 TDB
period 1474.637639943608
4.04
8.7065e-06
2.384e-08
d
yr
n .2441277709510839 1.4414e-09 deg/d
Q 2.936488991789207 1.1558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2237  
   data-arc span      17013 days (46.58 yr)  
   first obs. used      1974-08-21  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47796  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:02:39  

Additional Information
 Earth MOID = 1.12175 au 
 Jupiter MOID = 2.3095 au 
 T_jup = 3.419 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.07   n/a MPCxxxxx  
diameter diameter 6.769 km 0.511 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.765 h n/a LCDB (Rev. 2020-October); 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 0.238   0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3528 Counselman (1981 EW3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EW3 = 1974 QX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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