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4147 Lennon (1983 AY)
Classification: Main-belt Asteroid          SPK-ID: 2004147
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08069192325567301 3.0733e-08  
a 2.361666676173654 7.141e-09 au
q 2.17109924998437 7.3638e-08 au
i 5.733316070971457 3.3683e-06 deg
node 288.5520106580044 3.5443e-05 deg
peri 303.3783563052665 4.2556e-05 deg
M 359.8133401962014 2.2778e-05 deg
tp 2459001.187344771653
(2020-May-31.68734477)
8.3874e-05 TDB
period 1325.642225908592
3.63
6.0126e-06
1.646e-08
d
yr
n .2715664852583108 1.2317e-09 deg/d
Q 2.552234102362939 7.7173e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      17766 days (48.64 yr)  
   first obs. used      1971-12-16  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41917  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:12:18  

Additional Information
 Earth MOID = 1.16577 au 
 Jupiter MOID = 2.46389 au 
 T_jup = 3.540 
[ 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 13.0   n/a MPO332857  
diameter diameter 5.171 km 0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 137. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Hasegawa, S.; Miyasaka, S.; Yoshizumi, C.; Sekiguchi, T.; et al. (2012) arXiv:1204.0548.]
geometric albedo albedo 0.240   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4147 Lennon (1983 AY)          Discovered 1983-Jan-12 by Skiff, B. A. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1983 AY = 1971 YG = 1980 KA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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