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20314 Johnharrison (1998 FN126)
Classification: Main-belt Asteroid          SPK-ID: 2020314
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1600650158086968 2.9358e-08  
a 2.156054218097828 6.2268e-09 au
q 1.810945365593592 6.5494e-08 au
i 2.728000565160662 2.9532e-06 deg
node 292.4583049131367 8.4463e-05 deg
peri 1.385409364010224 8.6072e-05 deg
M 279.1879559962654 1.9041e-05 deg
tp 2459260.074206137501
(2021-Feb-14.57420614)
6.1697e-05 TDB
period 1156.346375859294
3.17
5.0094e-06
1.371e-08
d
yr
n .3113254017270387 1.3487e-09 deg/d
Q 2.501163070602064 7.2235e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1921  
   data-arc span      16115 days (44.12 yr)  
   first obs. used      1976-05-03  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47881  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:40:46  

Additional Information
 Earth MOID = .794848 au 
 Jupiter MOID = 2.67302 au 
 T_jup = 3.683 
[ 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 14.5   n/a MPO502320  
diameter diameter 3.750 km 0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.239   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20314 Johnharrison           Discovered 1998 Mar. 28 by J. Broughton at Reedy Creek Observatory.
John Harrison (1693-1776) was an English clockmaker who worked for decades on the problem of finding longitude at sea, developing a portable timepiece of unprecedented accuracy. This was a great step forward in improving maritime safety and enabled the charting of the world's oceans.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011230/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1998 FN126 = 1976 JR5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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