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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154091743445575 3.4067e-08  
a 3.055036268170193 1.3981e-08 au
q 2.396953428050974 1.0381e-07 au
i .4098669800107332 3.1302e-06 deg
node 231.7176622278346 0.00055064 deg
peri 295.482990134954 0.00055069 deg
M 190.6116599790062 9.4211e-06 deg
tp 2459918.206892881078
(2022-Dec-04.70689288)
5.5253e-05 TDB
period 1950.396830125627
5.34
1.3388e-05
3.665e-08
d
yr
n .1845778225433293 1.267e-09 deg/d
Q 3.713119108289412 1.6992e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2687  
   data-arc span      32339 days (88.54 yr)  
   first obs. used      1932-04-24  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46911  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:17:23  

Additional Information
 Earth MOID = 1.40394 au 
 Jupiter MOID = 1.26563 au 
 T_jup = 3.200 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457151.5 (2015-May-09.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2137010331555702 3.432e-08  
q 2.405251895733867 1.0462e-07 au
tp 2457968.810413180097
(2017-Aug-03.31041318)
4.71e-05 TDB
node 231.7290239351438 0.00055377 deg
peri 295.834979003269 0.00055381 deg
i .4072593651789321 3.1305e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2687  
   data-arc span      32339 days (88.54 yr)  
   first obs. used      1932-04-24  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46911  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:17:23  

Additional Information
 Jupiter MOID = 1.26563 au 
 T_jup = 3.200 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.177858808881252E-15 -3.570543120988553E-15 -6.773553110078341E-14 8.14341153429936E-15 -2.096092382247976E-14 -1.144068996171406E-17
q -3.570543120988553E-15 1.094466564419703E-14 4.777461667098666E-13 -2.000776712395808E-14 9.253466616055238E-14 1.742841113456816E-16
tp -6.773553110078341E-14 4.777461667098666E-13 2.218421557902503E-9 -8.593321095158508E-13 3.576829171840577E-10 1.886084677459484E-13
node 8.14341153429936E-15 -2.000776712395808E-14 -8.593321095158508E-13 3.066612291841427E-7 -3.066538010436038E-7 -3.563437231619203E-10
peri -2.096092382247976E-14 9.253466616055238E-14 3.576829171840577E-10 -3.066538010436038E-7 3.067110500291801E-7 3.563634171280998E-10
i -1.144068996171406E-17 1.742841113456816E-16 1.886084677459484E-13 -3.563437231619203E-10 3.563634171280998E-10 9.800308677852914E-12

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 12.5   n/a MPO309183  
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

[ show close-approach data ]
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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