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JPL Small-Body Database Browser
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20441 Elijahmena (1999 JH50)
Classification: Main-belt Asteroid          SPK-ID: 2020441
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1839981176550091 5.0729e-08  
a 2.287612327539562 7.5771e-09 au
q 1.866695965347888 1.145e-07 au
i 5.255714626343222 3.755e-06 deg
node 119.5034986419925 5.3713e-05 deg
peri 233.1205202183804 5.436e-05 deg
M 289.9576134717878 9.9361e-06 deg
tp 2459246.384132545824
(2021-Jan-31.88413255)
3.5329e-05 TDB
period 1263.781719956707
3.46
6.2789e-06
1.719e-08
d
yr
n .2848593189117598 1.4153e-09 deg/d
Q 2.708528689731236 8.9712e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1283  
   data-arc span      9838 days (26.93 yr)  
   first obs. used      1992-04-26  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50709  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:41:09  

Additional Information
 Earth MOID = .866485 au 
 Jupiter MOID = 2.72484 au 
 T_jup = 3.573 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO337430  
diameter diameter 2.710 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.240   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20441 Elijahmena           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Elijah Login Mena (b. 1991) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his botany and zoology project. He attends the Ledyard Middle School, Gales Ferry, Connecticut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

Alternate Designations
 1999 JH50 = 2000 TN25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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