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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1603992292412 3.315e-08  
a 2.322746619939699 8.6168e-09 au
q 1.950179852378769 7.6927e-08 au
i 5.474236289280891 3.9142e-06 deg
node 129.9635538552762 3.9218e-05 deg
peri 198.7350903371514 4.1079e-05 deg
M 268.6367205996539 1.2352e-05 deg
tp 2459328.648452877439
(2021-Apr-24.14845288)
4.4859e-05 TDB
period 1293.007910959801
3.54
7.1951e-06
1.97e-08
d
yr
n .2784205703217792 1.5493e-09 deg/d
Q 2.695313387500629 9.9989e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      8774 days (24.02 yr)  
   first obs. used      1995-03-25  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55371  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:41:10  

Additional Information
 Earth MOID = .939593 au 
 Jupiter MOID = 2.63464 au 
 T_jup = 3.553 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456518.5 (2013-Aug-14.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607019745018765 3.3283e-08  
q 1.949840927022833 7.7292e-08 au
tp 2456740.046957074172
(2014-Mar-23.54695707)
4.2667e-05 TDB
node 130.0082250825063 3.9172e-05 deg
peri 198.2559708967271 4.102e-05 deg
i 5.476295905727225 3.9173e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      8774 days (24.02 yr)  
   first obs. used      1995-03-25  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55371  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:41:10  

Additional Information
 Jupiter MOID = 2.63464 au 
 T_jup = 3.553 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.107757944224638E-15 -2.561215097344256E-15 -1.448010929429968E-13 -7.088799047856903E-16 -4.984544789347407E-14 -4.036252961763883E-17
q -2.561215097344256E-15 5.974099840232271E-15 3.299449481891445E-13 1.527432940213409E-15 1.104333680763935E-13 1.626810334080725E-16
tp -1.448010929429968E-13 3.299449481891445E-13 1.820487624710776E-9 -7.881020663077337E-12 5.310923261001456E-10 -3.968533251110185E-13
node -7.088799047856903E-16 1.527432940213409E-15 -7.881020663077337E-12 1.534481842326523E-9 -1.529328148369824E-9 -9.995695430210627E-12
peri -4.984544789347407E-14 1.104333680763935E-13 5.310923261001456E-10 -1.529328148369824E-9 1.682637748991167E-9 9.844269623731782E-12
i -4.036252961763883E-17 1.626810334080725E-16 -3.968533251110185E-13 -9.995695430210627E-12 9.844269623731782E-12 1.534552254446089E-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 15.3   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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