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20353 (1998 HD129)
Classification: Main-belt Asteroid          SPK-ID: 2020353
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1719548343411624 5.7723e-08  
a 2.534025182972442 8.7276e-09 au
q 2.098287302418082 1.4675e-07 au
i 12.58758244732324 5.9724e-06 deg
node 355.6555071351559 1.7363e-05 deg
peri 313.3627885983331 2.1491e-05 deg
M 124.1895251314805 1.1431e-05 deg
tp 2458692.226716467759
(2019-Jul-27.72671647)
4.6379e-05 TDB
period 1473.380157286905
4.03
7.6118e-06
2.084e-08
d
yr
n .2443361261650945 1.2623e-09 deg/d
Q 2.969763063526802 1.0228e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1347  
   data-arc span      10723 days (29.36 yr)  
   first obs. used      1991-09-11  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52823  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:41  

Additional Information
 Earth MOID = 1.10418 au 
 Jupiter MOID = 2.40812 au 
 T_jup = 3.395 
[ 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 14.76   n/a E2021B10  
diameter diameter 3.640 km 0.601 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.176   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20353 (1998 HD129)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HD129 = 1991 RW15 = 1999 RX28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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