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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154896765801701 1.9949e-08  
a 3.055503006215658 1.3237e-08 au
q 2.397073651616508 6.2759e-08 au
i .4097782082374134 1.8107e-06 deg
node 231.7234398066175 0.00017071 deg
peri 295.391399196724 0.0001709 deg
M 263.823200674309 8.0864e-06 deg
tp 2459917.683093332350
(2022-Dec-04.18309333)
4.6118e-05 TDB
period 1950.843809682976
5.34
1.2677e-05
3.471e-08
d
yr
n .1845355318622367 1.1992e-09 deg/d
Q 3.713932360814807 1.609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2798  
   data-arc span      32436 days (88.80 yr)  
   first obs. used      1932-04-24  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46933  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:24:04  

Additional Information
 Earth MOID = 1.40488 au 
 Jupiter MOID = 1.26337 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

[ 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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