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541998 (2012 HD11)
Classification: Main-belt Asteroid          SPK-ID: 2541998
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08081801905927527 1.1553e-07  
a 2.700813482574791 5.1626e-08 au
q 2.482539087064514 2.8649e-07 au
i 15.11371743756648 1.0071e-05 deg
node 40.47705328911068 2.2039e-05 deg
peri 158.6971202136303 5.5565e-05 deg
M 345.2758168384091 4.5138e-05 deg
tp 2459266.808472999260
(2021-Feb-21.30847300)
0.00020264 TDB
period 1621.21389130793
4.44
4.6484e-05
1.273e-07
d
yr
n .2220558323180703 6.3669e-09 deg/d
Q 2.919087878085068 5.5798e-08 au
  Orbit Determination Parameters
   # obs. used (total)      99  
   data-arc span      5661 days (15.50 yr)  
   first obs. used      2005-10-31  
   last obs. used      2021-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .66194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 13:25:55  

Additional Information
 Earth MOID = 1.48182 au 
 Jupiter MOID = 2.04926 au 
 T_jup = 3.313 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   .29061 MPO535746 autocmod 2.8

541998 (2012 HD11)          Discovered 2012-Apr-20 by Mount Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2019-12-13
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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