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3731 Hancock (1984 DH1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003731
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156967679856702 6.8144e-08  
a 3.227911046457209 2.4003e-08 au
q 2.854452171036868 2.2501e-07 au
i 21.57012959790718 5.1369e-06 deg
node 264.2599844053132 1.4725e-05 deg
peri 253.9915281507309 2.6426e-05 deg
M 351.4956751204309 2.2303e-05 deg
tp 2458650.540092734320
(2019-Jun-16.04009273)
0.00013119 TDB
period 2118.267309805304
5.80
2.3627e-05
6.469e-08
d
yr
n .1699502222092492 1.8956e-09 deg/d
Q 3.60136992187755 2.678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1968  
   data-arc span      18196 days (49.82 yr)  
   first obs. used      1969-07-16  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41163  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 23:50:53  

Additional Information
 Earth MOID = 1.95313 au 
 Jupiter MOID = 1.85201 au 
 T_jup = 3.067 
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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 10.8   n/a MPO435733  
diameter diameter 53.112 km 0.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.712 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Clark, M. (2011) Minor Planet Bull. 38, 187-189.]
geometric albedo albedo 0.019   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3731 Hancock (1984 DH1)          Discovered 1984-Feb-20 by at Perth
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1984 DH1 = 1969 OA = 1969 PR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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