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385518 (2004 HP54)
Classification: Outer Main-belt Asteroid          SPK-ID: 2385518
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1731718525870879 5.9005e-08  
a 3.219609600902177 5.0706e-08 au
q 2.662063841706772 1.9579e-07 au
i 15.39344106949355 6.3665e-06 deg
node 67.06279302894667 2.8326e-05 deg
peri 200.3169871809565 4.1642e-05 deg
M 277.0398836524732 3.7675e-05 deg
tp 2459686.761739386879
(2022-Apr-17.26173939)
0.00022874 TDB
period 2110.101020663472
5.78
4.9848e-05
1.365e-07
d
yr
n .170607945531824 4.0304e-09 deg/d
Q 3.777155360097582 5.9487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      231  
   data-arc span      6235 days (17.07 yr)  
   first obs. used      2004-03-23  
   last obs. used      2021-04-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61732  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 12:29:53  

Additional Information
 Earth MOID = 1.65031 au 
 Jupiter MOID = 1.32239 au 
 T_jup = 3.110 
[ 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 15.57   n/a MPCxxxxx  
diameter diameter 4.449 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.062   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

385518 (2004 HP54)          Discovered 2004-Apr-21 by CSS at Catalina
Reference: Last Updated: 2014-02-19

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