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154578 (2003 HL54)
Classification: Main-belt Asteroid          SPK-ID: 2154578
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104990394207724 8.0491e-08  
a 2.585953927480733 2.1e-08 au
q 2.300208502507738 2.1919e-07 au
i 2.147706247967697 4.2089e-06 deg
node 236.7940003254299 0.00018727 deg
peri 327.9083555976552 0.0001907 deg
M 42.92469224662945 4.2515e-05 deg
tp 2458819.393394440654
(2019-Dec-01.89339444)
0.00017787 TDB
period 1518.901466474322
4.16
1.8502e-05
5.066e-08
d
yr
n .2370133994508762 2.8871e-09 deg/d
Q 2.871699352453727 2.332e-08 au
  Orbit Determination Parameters
   # obs. used (total)      356  
   data-arc span      5793 days (15.86 yr)  
   first obs. used      2003-03-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57316  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:33:03  

Additional Information
 Earth MOID = 1.29648 au 
 Jupiter MOID = 2.09274 au 
 T_jup = 3.412 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456553.5 (2013-Sep-18.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1117058973443853 7.9911e-08  
q 2.295699534729843 2.1837e-07 au
tp 2457299.594536888939
(2015-Oct-04.09453689)
0.00016346 TDB
node 236.9189986025015 0.00018713 deg
peri 327.6511902465918 0.00019049 deg
i 2.148890911781616 4.212e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      356  
   data-arc span      5793 days (15.86 yr)  
   first obs. used      2003-03-31  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57316  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:33:03  

Additional Information
 Jupiter MOID = 2.09274 au 
 T_jup = 3.412 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.385829234287574E-15 -1.740479249698641E-14 -8.874006470323217E-12 3.292771875290226E-14 -1.690840469887083E-12 -7.293438515805108E-15
q -1.740479249698641E-14 4.768332004237185E-14 2.492952186665827E-11 -9.446986856610051E-14 4.764046660464675E-12 2.03660601249178E-14
tp -8.874006470323217E-12 2.492952186665827E-11 2.671799323473472E-8 -9.662464187052349E-11 5.863982689706962E-9 1.646332265909325E-11
node 3.292771875290226E-14 -9.446986856610051E-14 -9.662464187052349E-11 3.50158575550648E-8 -3.501124287381827E-8 4.073691279961127E-11
peri -1.690840469887083E-12 4.764046660464675E-12 5.863982689706962E-9 -3.501124287381827E-8 3.628816917536177E-8 -3.73000199249447E-11
i -7.293438515805108E-15 2.03660601249178E-14 1.646332265909325E-11 4.073691279961127E-11 -3.73000199249447E-11 1.774121421966776E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO426968  

154578 (2003 HL54)          Discovered 2003-Apr-24 by LONEOS at Anderson Mesa
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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