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JPL Small-Body Database Browser
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17954 Hopkins (1999 JP20)
Classification: Main-belt Asteroid          SPK-ID: 2017954
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1013951254707081 3.8788e-08  
a 2.27254351160823 7.0683e-09 au
q 2.04211867711107 8.8892e-08 au
i 3.071178685962644 3.9629e-06 deg
node 38.83196113878982 6.4645e-05 deg
peri 145.865485607932 6.6711e-05 deg
M 82.29414810144489 1.5688e-05 deg
tp 2458714.455770595639
(2019-Aug-18.95577060)
5.4428e-05 TDB
period 1251.315250977876
3.43
5.838e-06
1.598e-08
d
yr
n .2876972846919814 1.3422e-09 deg/d
Q 2.502968346105391 7.785e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1748  
   data-arc span      16109 days (44.10 yr)  
   first obs. used      1975-04-15  
   last obs. used      2019-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52949  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:26:35  

Additional Information
 Earth MOID = 1.04439 au 
 Jupiter MOID = 2.45303 au 
 T_jup = 3.603 
[ 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 14.8   n/a MPO474004  
diameter diameter 2.828 km 0.737 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.221   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17954 Hopkins           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Brandon James Hopkins (b. 1986) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for his mathematics project. He attends the Waterford School, Sandy, Utah, 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: 20040614/MPCPages.arcLast Updated: 2009-12-11

[ show close-approach data ]
Alternate Designations
 1999 JP20 = 1975 GS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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