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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04570838859872959 3.88e-08  
a 2.764133436019673 1.5315e-08 au
q 2.637789350787345 1.1057e-07 au
i 9.603833460652096 4.3571e-06 deg
node 89.71163341506212 3.2646e-05 deg
peri 35.99514166776174 7.2796e-05 deg
M 295.6658431680432 6.4445e-05 deg
tp 2458900.468772622340
(2020-Feb-20.96877262)
0.0003009 TDB
period 1678.560246403995
4.60
1.3951e-05
3.82e-08
d
yr
n .2144695138415398 1.7825e-09 deg/d
Q 2.890477521252002 1.6015e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1616  
   data-arc span      13475 days (36.89 yr)  
   first obs. used      1982-12-23  
   last obs. used      2019-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .485  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:00:39  

Additional Information
 Earth MOID = 1.66027 au 
 Jupiter MOID = 2.18882 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

[ show close-approach data ]
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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