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21529 Johnjames (1998 MF37)
Classification: Main-belt Asteroid          SPK-ID: 2021529
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1791656147707561 1.5966e-08  
a 2.883626016210184 1.3594e-08 au
q 2.36697938824694 4.8121e-08 au
i 13.47977451758725 1.4818e-06 deg
node 132.9388076258415 3.5718e-06 deg
peri 187.6716891535321 7.7485e-06 deg
M 235.4340462973255 1.0025e-05 deg
tp 2460015.376064228641
(2023-Mar-11.87606423)
5.2022e-05 TDB
period 1788.573655158609
4.90
1.2648e-05
3.463e-08
d
yr
n .2012777047015576 1.4233e-09 deg/d
Q 3.400272644173428 1.603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2175  
   data-arc span      9331 days (25.55 yr)  
   first obs. used      1995-11-21  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49205  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:08:47  

Additional Information
 Earth MOID = 1.35391 au 
 Jupiter MOID = 1.92539 au 
 T_jup = 3.229 
[ 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 13.31   n/a MPO614063  
diameter diameter 6.128 km 0.345 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 65.2342 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.325   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21529 Johnjames           Discovered 1998 June 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John James Hutchison (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany team project. He attends the Lake Highland Preparatory School, Orlando, Florida, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 MF37 = 1995 YZ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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