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20668 (1999 UN11)
Classification: Main-belt Asteroid          SPK-ID: 2020668
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .117640472703405 8.056e-09  
a 2.344018252296902 6.6867e-09 au
q 2.068266837071285 1.7719e-08 au
i 9.675551623688778 2.408e-07 deg
node 215.854433475594 2.6448e-06 deg
peri 344.306763111599 9.8212e-06 deg
M 158.844349363316 8.4249e-06 deg
tp 2458622.125443010328
(2019-May-18.62544301)
3.0014e-05 TDB
period 1310.810496884868
3.59
5.6089e-06
1.536e-08
d
yr
n .2746392410310547 1.1752e-09 deg/d
Q 2.619769667522519 7.4733e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2445  
   data-arc span      9800 days (26.83 yr)  
   first obs. used      1994-04-14  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45387  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:18  

Additional Information
 Earth MOID = 1.06552 au 
 Jupiter MOID = 2.34772 au 
 T_jup = 3.534 
[ 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 14.10   n/a E2021B10  
rotation period rot_per 5.10551 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

20668 (1999 UN11)          Discovered 1999-Oct-27 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UN11 = 1994 GP9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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