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JPL Small-Body Database Browser
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116989 (2004 HW42)
Classification: Main-belt Asteroid          SPK-ID: 2116989
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0931481864921523 4.9679e-08  
a 3.023033796126596 2.8899e-08 au
q 2.741443680312917 1.4955e-07 au
i 6.290355936997635 7.3489e-06 deg
node 18.63934583476539 4.7845e-05 deg
peri 271.7433530805907 6.5566e-05 deg
M 244.068728785004 4.8567e-05 deg
tp 2459218.745590828306
(2021-Jan-04.24559083)
0.0002618 TDB
period 1919.830692492228
5.26
2.7529e-05
7.537e-08
d
yr
n .1875165353944133 2.6889e-09 deg/d
Q 3.304623911940276 3.1591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      476  
   data-arc span      7676 days (21.02 yr)  
   first obs. used      1998-03-25  
   last obs. used      2019-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58174  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:20:29  

Additional Information
 Earth MOID = 1.73422 au 
 Jupiter MOID = 1.8736 au 
 T_jup = 3.230 
[ 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 14.9   n/a MPO469209  
diameter diameter 6.374 km 0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 56.595 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.057   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

116989 (2004 HW42)          Discovered 2004-Apr-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2004 HW42 = 2000 SQ340 = 2001 YR141 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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