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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08107683183263922 3.0647e-08  
a 2.362621994700281 7.1225e-09 au
q 2.171068088551871 7.3469e-08 au
i 5.732770544405124 3.3586e-06 deg
node 288.5526778392951 3.5085e-05 deg
peri 303.4699281461393 4.2085e-05 deg
M 54.0083758871902 2.2399e-05 deg
tp 2459001.502139247349
(2020-Jun-01.00213925)
8.2722e-05 TDB
period 1326.446661173273
3.63
5.9982e-06
1.642e-08
d
yr
n .2714017913706169 1.2273e-09 deg/d
Q 2.55417590084869 7.7e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2595  
   data-arc span      17830 days (48.82 yr)  
   first obs. used      1971-12-16  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4153  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:00:13  

Additional Information
 Earth MOID = 1.16435 au 
 Jupiter MOID = 2.46102 au 
 T_jup = 3.539 
[ 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 13.08   n/a MPCxxxxx  
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. 2020-October); 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2065-Apr-22 04:42 00:08 Thisb 0.0380435658241339 0.0380407273345675 0.0380464045953777 2.0377604247876 2.03776033683667 2475397.695962911 7.90914967447008 221.464926765333 42.6195668398995 51.7553071708788 105848.548357237 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 16:00:28 2021-Apr-12 16:00

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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