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43101 (1999 XX18)
Classification: Main-belt Asteroid          SPK-ID: 2043101
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 .2261071846368961 3.0684e-08  
a 2.293471106926087 4.9277e-09 au
q 1.774900811892964 7.0866e-08 au
i 6.623659693094091 3.833e-06 deg
node 203.1882102180747 2.0454e-05 deg
peri 227.8301111818109 2.2379e-05 deg
M 352.9589337853614 7.1497e-06 deg
tp 2459225.312713699550
(2021-Jan-10.81271370)
2.5184e-05 TDB
period 1268.639813849061
3.47
4.0886e-06
1.119e-08
d
yr
n .2837684865870304 9.1454e-10 deg/d
Q 2.81204140195921 6.0418e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1787  
   data-arc span      10873 days (29.77 yr)  
   first obs. used      1991-06-07  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46301  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:15:48  

Additional Information
 Earth MOID = .796193 au 
 Jupiter MOID = 2.51041 au 
 T_jup = 3.554 
[ 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 15.22   n/a MPCxxxxx  
rotation period rot_per 3.974 h n/a LCDB (Rev. 2020-October); 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.]

43101 (1999 XX18)          Discovered 1999-Dec-03 by LINEAR at Socorro
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

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