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120857 (1998 QX43)
Classification: Main-belt Asteroid          SPK-ID: 2120857
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2514836430638049 5.8057e-08  
a 2.988967407938091 2.1176e-08 au
q 2.237290995190842 1.6736e-07 au
i 2.804603106861588 5.3818e-06 deg
node 91.13216052242869 0.00010978 deg
peri 258.3605111079809 0.00011046 deg
M 112.9223313484361 1.3989e-05 deg
tp 2458608.451164641149
(2019-May-04.95116464)
7.0996e-05 TDB
period 1887.470601997434
5.17
2.0058e-05
5.492e-08
d
yr
n .1907314474826928 2.0269e-09 deg/d
Q 3.74064382068534 2.6501e-08 au
  Orbit Determination Parameters
   # obs. used (total)      414  
   data-arc span      9962 days (27.27 yr)  
   first obs. used      1993-10-15  
   last obs. used      2021-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57532  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:03  

Additional Information
 Earth MOID = 1.23148 au 
 Jupiter MOID = 1.69771 au 
 T_jup = 3.206 
[ 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 15.49   n/a E2021B55  
diameter diameter 4.162 km 1.205 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.071   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120857 (1998 QX43)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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