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186863 (2004 HH18)
Classification: Main-belt Asteroid          SPK-ID: 2186863
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2552117971210919 3.2593e-08  
a 2.579181478333351 1.5104e-08 au
q 1.920943938146462 7.995e-08 au
i 12.51749544947419 5.1823e-06 deg
node 53.29028623621113 2.2418e-05 deg
peri 238.8911606812597 2.6857e-05 deg
M 329.4398713612171 1.712e-05 deg
tp 2459328.932210125279
(2021-Apr-24.43221013)
7.2623e-05 TDB
period 1512.938515135187
4.14
1.329e-05
3.639e-08
d
yr
n .2379475414226153 2.0902e-09 deg/d
Q 3.23741901852024 1.8959e-08 au
  Orbit Determination Parameters
   # obs. used (total)      724  
   data-arc span      5876 days (16.09 yr)  
   first obs. used      2004-04-17  
   last obs. used      2020-05-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56441  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:53:01  

Additional Information
 Earth MOID = .936659 au 
 Jupiter MOID = 2.04947 au 
 T_jup = 3.347 
[ 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 15.62   n/a E2021B55  
diameter diameter 3.661 km 0.359 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

186863 (2004 HH18)          Discovered 2004-Apr-17 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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