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JPL Small-Body Database Browser
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20293 Sirichelson (1998 FQ72)
Classification: Main-belt Asteroid          SPK-ID: 2020293
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936710727892857 3.5998e-08  
a 2.442183028182623 7.6272e-09 au
q 1.969202821166708 8.9561e-08 au
i 3.255574706715225 3.8278e-06 deg
node 30.73784155478239 6.9789e-05 deg
peri 317.6549382421442 7.0448e-05 deg
M 48.16192195018044 9.8493e-06 deg
tp 2458414.005061763666
(2018-Oct-22.50506176)
3.7941e-05 TDB
period 1394.009521350273
3.82
6.5305e-06
1.788e-08
d
yr
n .2582478774257544 1.2098e-09 deg/d
Q 2.915163235198538 9.1044e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2550  
   data-arc span      14293 days (39.13 yr)  
   first obs. used      1980-10-10  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41885  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:06:25  

Additional Information
 Earth MOID = .963443 au 
 Jupiter MOID = 2.50544 au 
 T_jup = 3.473 
[ 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 14.3   n/a MPO452457  
diameter diameter 3.944 km 0.271 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20293 Sirichelson           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Silas Isaac Richelson (b. 1986) is a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors, for his mathematics project. He attends the Byram Hills High School, Armonk, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

Alternate Designations
 1998 FQ72 = 1980 TJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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