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216691 (2004 HM30)
Classification: Main-belt Asteroid          SPK-ID: 2216691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08181908623767586 4.6031e-08  
a 3.014635885135886 2.8273e-08 au
q 2.767981131674761 1.3455e-07 au
i 8.449376679604697 5.7665e-06 deg
node 216.4264905720952 3.3098e-05 deg
peri 309.8475011905658 4.8968e-05 deg
M 114.3330062922919 3.4926e-05 deg
tp 2458593.316661193057
(2019-Apr-19.81666119)
0.00018602 TDB
period 1911.836389674608
5.23
2.6896e-05
7.364e-08
d
yr
n .1883006317613148 2.649e-09 deg/d
Q 3.261290638597012 3.0586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      369  
   data-arc span      6929 days (18.97 yr)  
   first obs. used      2001-09-20  
   last obs. used      2020-09-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6065  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:55:53  

Additional Information
 Earth MOID = 1.78239 au 
 Jupiter MOID = 1.75286 au 
 T_jup = 3.227 
[ 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 15.39   n/a E2021B55  

216691 (2004 HM30)          Discovered 2004-Apr-21 by LINEAR at Socorro
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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