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JPL Small-Body Database Browser
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19486 (1998 HW122)
Classification: Main-belt Asteroid          SPK-ID: 2019486
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0455256894327505 3.8759e-08  
a 2.763860982704077 1.4651e-08 au
q 2.638034305970194 1.1051e-07 au
i 9.603690082703926 4.2881e-06 deg
node 89.71093525161207 3.0529e-05 deg
peri 35.74836310510835 6.884e-05 deg
M 21.6795509216741 6.0543e-05 deg
tp 2458899.430410814659
(2020-Feb-19.93041081)
0.00028219 TDB
period 1678.312075659604
4.59
1.3345e-05
3.654e-08
d
yr
n .2145012272872518 1.7056e-09 deg/d
Q 2.889687659437959 1.5318e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1664  
   data-arc span      13529 days (37.04 yr)  
   first obs. used      1982-12-23  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 01:05:12  

Additional Information
 Earth MOID = 1.66015 au 
 Jupiter MOID = 2.18827 au 
 T_jup = 3.318 
[ 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 13.3   n/a MPO384921  
diameter diameter 6.607 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.161   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19486 (1998 HW122)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 HW122 = 1982 YE4 = 2000 UB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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