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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .215463288621862 1.9949e-08  
a 3.05511571470616 1.3281e-08 au
q 2.39685043569524 6.2763e-08 au
i .4098581802330946 1.8109e-06 deg
node 231.7195839586736 0.00017067 deg
peri 295.4382637868049 0.00017086 deg
M 227.5925318152188 7.9351e-06 deg
tp 2459917.881055312062
(2022-Dec-04.38105531)
4.613e-05 TDB
period 1950.472911028944
5.34
1.2718e-05
3.482e-08
d
yr
n .1845706228291513 1.2035e-09 deg/d
Q 3.71338099371708 1.6142e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2796  
   data-arc span      32436 days (88.80 yr)  
   first obs. used      1932-04-24  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46702  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:29:05  

Additional Information
 Earth MOID = 1.40353 au 
 Jupiter MOID = 1.26452 au 
 T_jup = 3.200 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457190.5 (2015-Jun-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2137189700429064 2.0178e-08  
q 2.405130927564418 6.3619e-08 au
tp 2457968.838197939766
(2017-Aug-03.33819794)
3.8455e-05 TDB
node 231.7220031520143 0.00017156 deg
peri 295.8504443643317 0.00017174 deg
i .4073065107748101 1.8116e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2796  
   data-arc span      32436 days (88.80 yr)  
   first obs. used      1932-04-24  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46702  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 16:29:05  

Additional Information
 Jupiter MOID = 1.26452 au 
 T_jup = 3.200 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.071340949000441E-16 -1.26600527128922E-15 -7.654038082153115E-14 -8.268861152320942E-13 8.357394576657145E-13 2.415151604068788E-15
q -1.26600527128922E-15 4.047368455805134E-15 4.369718395133784E-13 2.442430275717499E-12 -2.449495515617539E-12 -7.056738370720592E-15
tp -7.654038082153115E-14 4.369718395133784E-13 1.478824378022537E-9 -2.958853988658901E-10 4.888979543895085E-10 1.100846024924831E-12
node -8.268861152320942E-13 2.442430275717499E-12 -2.958853988658901E-10 2.943271256873059E-8 -2.94494873123695E-8 -1.609940317320406E-10
peri 8.357394576657145E-13 -2.449495515617539E-12 4.888979543895085E-10 -2.94494873123695E-8 2.949382236593796E-8 1.610025849316056E-10
i 2.415151604068788E-15 -7.056738370720592E-15 1.100846024924831E-12 -1.609940317320406E-10 1.610025849316056E-10 3.281818337032799E-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 12.59   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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