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3726 Johnadams (1981 LJ)
Classification: Main-belt Asteroid          SPK-ID: 2003726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07692805867969116 2.0646e-08  
a 2.86684663654653 1.1294e-08 au
q 2.646305690264604 6.3093e-08 au
i 3.025319956105455 6.8246e-07 deg
node 105.3445301846373 1.4066e-05 deg
peri 232.0238882345524 1.9284e-05 deg
M 6.10187015510202 1.2366e-05 deg
tp 2459366.448539810313
(2021-May-31.94853981)
6.0904e-05 TDB
period 1772.985231296913
4.85
1.0477e-05
2.868e-08
d
yr
n .203047376619525 1.1999e-09 deg/d
Q 3.087387582828457 1.2163e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2852  
   data-arc span      19239 days (52.67 yr)  
   first obs. used      1968-10-22  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:41:30  

Additional Information
 Earth MOID = 1.63727 au 
 Jupiter MOID = 2.19647 au 
 T_jup = 3.293 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456559.5 (2013-Sep-24.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07608768857076173 2.1129e-08  
q 2.648109535162432 6.4586e-08 au
tp 2455834.639043064131
(2011-Sep-30.13904306)
6.4723e-05 TDB
node 105.364405146438 1.405e-05 deg
peri 234.4709238207695 1.91e-05 deg
i 3.026203078879182 6.8452e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2852  
   data-arc span      19239 days (52.67 yr)  
   first obs. used      1968-10-22  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:41:30  

Additional Information
 Jupiter MOID = 2.19647 au 
 T_jup = 3.293 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.464345578218666E-16 -1.349187379240147E-15 4.524350949571734E-13 -5.225601183699641E-14 1.796138837627448E-13 2.923946152544934E-15
q -1.349187379240147E-15 4.171330785988457E-15 -1.527716424420592E-12 1.611884878327395E-13 -5.644847104433353E-13 -8.895284530287359E-15
tp 4.524350949571734E-13 -1.527716424420592E-12 4.189100413426674E-9 5.593336140902985E-11 8.068720409591786E-10 -4.171665725636678E-12
node -5.225601183699641E-14 1.611884878327395E-13 5.593336140902985E-11 1.973888460294638E-10 -1.895830991553253E-10 -7.91267098118696E-12
peri 1.796138837627448E-13 -5.644847104433353E-13 8.068720409591786E-10 -1.895830991553253E-10 3.648218483163008E-10 7.2254402768989E-12
i 2.923946152544934E-15 -8.895284530287359E-15 -4.171665725636678E-12 -7.91267098118696E-12 7.2254402768989E-12 4.685607929538551E-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 12.17   n/a E2021B10  
diameter diameter 10.143 km 0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.509 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.261   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3726 Johnadams (1981 LJ)          Discovered 1981-Jun-04 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 LJ = 1968 UJ = 1971 KF = 1982 RC = 1985 FU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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