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109943 (2001 SY42)
Classification: Main-belt Asteroid          SPK-ID: 2109943
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1145642881442367 8.8078e-08  
a 2.518607858270842 1.0796e-08 au
q 2.230065341873563 2.2068e-07 au
i 3.650730553391997 7.2885e-06 deg
node 38.78050406887361 0.0001083 deg
peri 62.21111023160709 0.00017985 deg
M 161.4158436543786 0.00013967 deg
tp 2458345.889574779294
(2018-Aug-15.38957478)
0.00056594 TDB
period 1459.954287907732
4.00
9.3869e-06
2.57e-08
d
yr
n .2465830628957006 1.5854e-09 deg/d
Q 2.807150374668121 1.2033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      839  
   data-arc span      7416 days (20.30 yr)  
   first obs. used      1999-02-10  
   last obs. used      2019-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58411  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:36:09  

Additional Information
 Earth MOID = 1.24972 au 
 Jupiter MOID = 2.32217 au 
 T_jup = 3.445 
[ 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 15.7   n/a MPO366469  
rotation period rot_per 5.15 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

109943 (2001 SY42)          Discovered 2001-Sep-16 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 SY42 = 1999 CE99 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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