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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1461265720012143 2.4032e-08  
a 2.238451556354962 5.9132e-09 au
q 1.911354303834029 5.2814e-08 au
i 2.036397886229575 2.8222e-06 deg
node 78.15839227963799 0.00010253 deg
peri 204.7412470890239 0.00010345 deg
M 127.3648197723031 1.4519e-05 deg
tp 2458567.720220313146
(2019-Mar-25.22022031)
4.9173e-05 TDB
period 1223.263385963256
3.35
4.8471e-06
1.327e-08
d
yr
n .2942947562486871 1.1661e-09 deg/d
Q 2.565548808875896 6.7772e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2918  
   data-arc span      25472 days (69.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:56:47  

Additional Information
 Earth MOID = .895126 au 
 Jupiter MOID = 2.56086 au 
 T_jup = 3.621 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457072.5 (2015-Feb-19.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1459638438231029 2.4e-08  
q 1.911651996896705 5.2717e-08 au
tp 2457345.094897144709
(2015-Nov-18.59489714)
4.9184e-05 TDB
node 78.16188242914592 0.00010254 deg
peri 204.9003891957393 0.00010346 deg
i 2.036577646515687 2.8222e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2918  
   data-arc span      25472 days (69.74 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:56:47  

Additional Information
 Jupiter MOID = 2.56086 au 
 T_jup = 3.621 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.760072059176346E-16 -1.259680453336839E-15 1.370212142436368E-13 1.647091496253407E-15 3.054799285907685E-14 -1.479042399945313E-17
q -1.259680453336839E-15 2.779058774735309E-15 -3.134550201770548E-13 -3.184510861698369E-15 -7.304586476064372E-14 4.010623190622229E-17
tp 1.370212142436368E-13 -3.134550201770548E-13 2.419058643403237E-9 3.732985824218193E-12 6.921896534682333E-10 -3.284431537103102E-13
node 1.647091496253407E-15 -3.184510861698369E-15 3.732985824218193E-12 1.051418321655532E-8 -1.050631687850885E-8 -7.089976904274209E-11
peri 3.054799285907685E-14 -7.304586476064372E-14 6.921896534682333E-10 -1.050631687850885E-8 1.070392011681789E-8 7.076205819137246E-11
i -1.479042399945313E-17 4.010623190622229E-17 -3.284431537103102E-13 -7.089976904274209E-11 7.076205819137246E-11 7.964711998253097E-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. 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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