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JPL Small-Body Database Browser
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4125 Lew Allen (1987 MO)
Classification: Inner Main-belt Asteroid          SPK-ID: 2004125
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1179968115270302 5.7161e-08  
a 1.921519897905534 4.6794e-09 au
q 1.694786676666936 1.094e-07 au
i 20.44472683861665 4.5194e-06 deg
node 276.043461767131 1.1126e-05 deg
peri 33.87608548137477 1.9845e-05 deg
M 123.6554919560888 1.5655e-05 deg
tp 2458666.322916210026
(2019-Jul-01.82291621)
4.2372e-05 TDB
period 972.8945173507668
2.66
3.5539e-06
9.73e-09
d
yr
n .3700298373355986 1.3517e-09 deg/d
Q 2.148253119144132 5.2316e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2588  
   data-arc span      14776 days (40.45 yr)  
   first obs. used      1979-08-23  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:04:57  

Additional Information
 Earth MOID = .697959 au 
 Jupiter MOID = 3.0541 au 
 T_jup = 3.839 
[ 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 13.6   n/a MPO502192  
diameter diameter 6.392 km 0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.6283 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2007) Minor Planet Bull. 34, 32-37.]
[Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.]
[Warner, B.D (2012) Minor Planet Bull. 39, 16-21.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 108-114.]
[Stephens, R.D.; Warner, B.D. (2020) Minor Planet Bull. 47-1, in progress. (MBA Gaggle) http://www.planetarysciences.org/lightcurves.html]
geometric albedo albedo 0.172   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4125 Lew Allen (1987 MO)          Discovered 1987-Jun-28 by Helin, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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