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3836 Lem (1979 SR9)
Classification: Main-belt Asteroid          SPK-ID: 2003836
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1461265718296002 2.4049e-08  
a 2.238451556422101 6.0248e-09 au
q 1.911354304275507 5.2827e-08 au
i 2.036397665916053 2.8575e-06 deg
node 78.15840935894923 0.00010896 deg
peri 204.7412296671286 0.00010992 deg
M 127.3648200734864 1.5068e-05 deg
tp 2458567.720219270269
(2019-Mar-25.22021927)
5.1133e-05 TDB
period 1223.263386018291
3.35
4.9386e-06
1.352e-08
d
yr
n .2942947562354467 1.1881e-09 deg/d
Q 2.565548808568696 6.9052e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2808  
   data-arc span      25386 days (69.50 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:08:16  

Additional Information
 Earth MOID = .895126 au 
 Jupiter MOID = 2.56086 au 
 T_jup = 3.621 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO435735  
diameter diameter 4.054 km 0.667 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 1.00 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, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.367   0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

3836 Lem (1979 SR9)          Discovered 1979-Sep-22 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1979 SR9 = 1985 JC1 = 1985 JH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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