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JPL Small-Body Database Browser
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20450 Marymohammed (1999 JJ111)
Classification: Main-belt Asteroid          SPK-ID: 2020450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1603992131202642 3.2834e-08  
a 2.322746623277037 8.532e-09 au
q 1.95017989262565 7.6326e-08 au
i 5.47423489886008 3.8716e-06 deg
node 129.9635300308509 3.9057e-05 deg
peri 198.7351390895809 4.0893e-05 deg
M 268.6366973629911 1.233e-05 deg
tp 2459328.648537043526
(2021-Apr-24.14853704)
4.4797e-05 TDB
period 1293.007913746504
3.54
7.1243e-06
1.951e-08
d
yr
n .2784205697217244 1.5341e-09 deg/d
Q 2.695313353928424 9.9005e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1164  
   data-arc span      9076 days (24.85 yr)  
   first obs. used      1995-03-25  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54723  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:06:59  

Additional Information
 Earth MOID = .939593 au 
 Jupiter MOID = 2.63464 au 
 T_jup = 3.553 
[ show covariance matrix ]

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 15.3   n/a MPO431735  
diameter diameter 2.041 km 0.407 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20450 Marymohammed           Discovered 1999 May 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Maryam Khadijah Mohammed (b. 1990) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her biochemistry, medicine, health, and microbiology project. She attends the C.W. Ruckel Middle School, Niceville, Florida.
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

[ show close-approach data ]
Alternate Designations
 1999 JJ111 = 1995 FP7 = 1998 BA24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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