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249829 (2001 LH18)
Classification: Main-belt Asteroid          SPK-ID: 2249829
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1645264825690164 3.6871e-08  
a 2.593453647316414 1.8165e-08 au
q 2.166761841017658 9.6298e-08 au
i 18.49932282986867 4.5053e-06 deg
node 121.8009138072847 1.3511e-05 deg
peri 122.1570655409198 2.1732e-05 deg
M 197.89593006748 2.0066e-05 deg
tp 2459687.422244488795
(2022-Apr-17.92224449)
8.9559e-05 TDB
period 1525.513875863251
4.18
1.6027e-05
4.388e-08
d
yr
n .2359860540739328 2.4793e-09 deg/d
Q 3.020145453615171 2.1153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      408  
   data-arc span      7118 days (19.49 yr)  
   first obs. used      2001-04-27  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:14:57  

Additional Information
 Earth MOID = 1.2052 au 
 Jupiter MOID = 2.24995 au 
 T_jup = 3.327 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457553.5 (2016-Jun-14.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1650876407797997 3.6799e-08  
q 2.164315096714595 9.6095e-08 au
tp 2458162.570645329358
(2018-Feb-13.07064533)
7.985e-05 TDB
node 121.8456096571624 1.3514e-05 deg
peri 122.2474602674487 2.1712e-05 deg
i 18.50030630829135 4.5056e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      408  
   data-arc span      7118 days (19.49 yr)  
   first obs. used      2001-04-27  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:14:57  

Additional Information
 Jupiter MOID = 2.24995 au 
 T_jup = 3.327 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.354140149946268E-15 -3.492099896608355E-15 4.016178335085837E-13 -4.603554234636168E-15 7.223488204156686E-14 4.781597247116905E-15
q -3.492099896608355E-15 9.234293106488798E-15 -4.067176328931645E-13 7.779611346419411E-15 -7.30948751425153E-14 -1.157807428592169E-14
tp 4.016178335085837E-13 -4.067176328931645E-13 6.376028363630736E-9 -4.69832984183284E-11 1.372639454298074E-9 -1.296090557028634E-12
node -4.603554234636168E-15 7.779611346419411E-15 -4.69832984183284E-11 1.826414338827203E-10 -1.824032279028923E-10 1.766520588273531E-12
peri 7.223488204156686E-14 -7.30948751425153E-14 1.372639454298074E-9 -1.824032279028923E-10 4.713926094015173E-10 -2.067783397118488E-12
i 4.781597247116905E-15 -1.157807428592169E-14 -1.296090557028634E-12 1.766520588273531E-12 -2.067783397118488E-12 2.030022928494174E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO418334  
diameter diameter 2.997 km 0.697 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.136   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249829 (2001 LH18)          Discovered 2001-Jun-13 by LONEOS at Anderson Mesa
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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