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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1460024750658205 1.0945e-08  
a 2.238788826045396 5.5992e-09 au
q 1.911920116293065 2.3886e-08 au
i 2.036252521742022 4.1316e-07 deg
node 78.15758392502219 6.3043e-06 deg
peri 204.7916096634518 8.2226e-06 deg
M 186.1578512411392 4.9806e-06 deg
tp 2459791.341107417831
(2022-Jul-30.84110742)
1.7892e-05 TDB
period 1223.539861817185
3.35
4.5901e-06
1.257e-08
d
yr
n .2942282562542203 1.1038e-09 deg/d
Q 2.565657535797726 6.4167e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3247  
   data-arc span      25612 days (70.12 yr)  
   first obs. used      1951-02-04  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:14:30  

Additional Information
 Earth MOID = .893787 au 
 Jupiter MOID = 2.55996 au 
 T_jup = 3.621 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457278.5 (2015-Sep-13.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1460243974616391 1.0931e-08  
q 1.911438973834749 2.3855e-08 au
tp 2457345.170505777055
(2015-Nov-18.67050578)
1.5687e-05 TDB
node 78.16094261976299 6.3054e-06 deg
peri 204.9372909366031 8.2315e-06 deg
i 2.03658695356649 4.1306e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3247  
   data-arc span      25612 days (70.12 yr)  
   first obs. used      1951-02-04  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:14:30  

Additional Information
 Jupiter MOID = 2.55996 au 
 T_jup = 3.621 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.19487935834318E-16 -2.557312257360746E-16 -1.206536750006971E-14 1.546740055532564E-14 -1.060872845243473E-14 2.330382068609274E-15
q -2.557312257360746E-16 5.690634085152426E-16 2.437617646218556E-14 -3.454177861884683E-14 2.279281286985189E-14 -5.215233655457621E-15
tp -1.206536750006971E-14 2.437617646218556E-14 2.460843093743649E-10 -6.944698079432351E-12 8.562909878530869E-11 -1.063142919992008E-12
node 1.546740055532564E-14 -3.454177861884683E-14 -6.944698079432351E-12 3.975764758349367E-11 -4.062688028145837E-11 9.533600532838948E-13
peri -1.060872845243473E-14 2.279281286985189E-14 8.562909878530869E-11 -4.062688028145837E-11 6.775822413490544E-11 -1.116041948062126E-12
i 2.330382068609274E-15 -5.215233655457621E-15 -1.063142919992008E-12 9.533600532838948E-13 -1.116041948062126E-12 1.706164341253892E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.82   n/a E2021B10  
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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