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JPL Small-Body Database Browser
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20349 (1998 HU123)
Classification: Main-belt Asteroid          SPK-ID: 2020349
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1597190009828624 3.6076e-08  
a 2.579164594035105 1.266e-08 au
q 2.167223001705448 9.4121e-08 au
i 14.58114092801742 3.8602e-06 deg
node 141.9836030134757 1.6787e-05 deg
peri 293.6099471034668 2.2064e-05 deg
M 160.2809978729826 1.6875e-05 deg
tp 2457926.908572968761
(2017-Jun-22.40857297)
6.8757e-05 TDB
period 1512.92365875719
4.14
1.1139e-05
3.05e-08
d
yr
n .2379498779837487 1.752e-09 deg/d
Q 2.991106186364762 1.4682e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1624  
   data-arc span      10668 days (29.21 yr)  
   first obs. used      1990-06-15  
   last obs. used      2019-08-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4554  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:29:40  

Additional Information
 Earth MOID = 1.22734 au 
 Jupiter MOID = 2.31296 au 
 T_jup = 3.363 
[ 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 13.6   n/a MPO492966  
diameter diameter 5.155 km 0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.246 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 0.290   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20349 (1998 HU123)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HU123 = 1997 GG32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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