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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1461265717154186 2.4022e-08  
a 2.238451556071252 5.8857e-09 au
q 1.911354304231516 5.2804e-08 au
i 2.036397965521495 2.8114e-06 deg
node 78.15838657919066 0.00010104 deg
peri 204.741253853349 0.00010194 deg
M 127.3648188957779 1.4399e-05 deg
tp 2458567.720223373817
(2019-Mar-25.22022337)
4.8742e-05 TDB
period 1223.263385730694
3.35
4.8246e-06
1.321e-08
d
yr
n .2942947563046371 1.1607e-09 deg/d
Q 2.565548807910988 6.7458e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2940  
   data-arc span      25486 days (69.78 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43467  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:14:23  

Additional Information
 Earth MOID = .895126 au 
 Jupiter MOID = 2.56086 au 
 T_jup = 3.621 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457103.5 (2015-Mar-22.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1459702791363693 2.3991e-08  
q 1.911584757914423 5.2716e-08 au
tp 2457345.119883928648
(2015-Nov-18.61988393)
4.8682e-05 TDB
node 78.16146628033955 0.00010105 deg
peri 204.9122553875439 0.00010196 deg
i 2.036583649632974 2.8113e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2940  
   data-arc span      25486 days (69.78 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43467  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:14:23  

Additional Information
 Jupiter MOID = 2.56086 au 
 T_jup = 3.621 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.75589752899528E-16 -1.259257303977124E-15 1.419228298804835E-13 1.76980344659249E-15 3.202153729305245E-14 -1.709633112701446E-17
q -1.259257303977124E-15 2.778984822103682E-15 -3.210641786059094E-13 -3.476794852542169E-15 -7.520989251295404E-14 4.58229452079971E-17
tp 1.419228298804835E-13 -3.210641786059094E-13 2.369920983758654E-9 3.846816002781796E-12 6.76135918889504E-10 -3.243174181704616E-13
node 1.76980344659249E-15 -3.476794852542169E-15 3.846816002781796E-12 1.021018591008955E-8 -1.020247354783627E-8 -6.658483844471076E-11
peri 3.202153729305245E-14 -7.520989251295404E-14 6.76135918889504E-10 -1.020247354783627E-8 1.039505550857516E-8 6.64511486998735E-11
i -1.709633112701446E-17 4.58229452079971E-17 -3.243174181704616E-13 -6.658483844471076E-11 6.64511486998735E-11 7.903440790709271E-12

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. 2020-October); 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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