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4419 Allancook (1932 HD)
Classification: Main-belt Asteroid          SPK-ID: 2004419
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154632986083166 3.3995e-08  
a 3.055115714221747 1.3925e-08 au
q 2.396850404805427 1.0364e-07 au
i .4098626425440475 3.1275e-06 deg
node 231.7200835573956 0.00054673 deg
peri 295.4377613889213 0.00054677 deg
M 227.592533850175 9.576e-06 deg
tp 2459917.881044116090
(2022-Dec-04.38104412)
5.5223e-05 TDB
period 1950.472910565049
5.34
1.3335e-05
3.651e-08
d
yr
n .184570622873049 1.2619e-09 deg/d
Q 3.713381023638068 1.6926e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2765  
   data-arc span      32405 days (88.72 yr)  
   first obs. used      1932-04-24  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46829  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:17:46  

Additional Information
 Earth MOID = 1.40353 au 
 Jupiter MOID = 1.26452 au 
 T_jup = 3.200 
[ 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 12.59   n/a E2021B10  
rotation period rot_per 5.2750 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Odden, C.; French, J.; Briggs, J. (2012) Minor Planet Bull. 39, 236-238.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

4419 Allancook (1932 HD)          Discovered 1932-Apr-24 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1932 HD = 1953 DH = 1985 CK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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