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58640 (1997 WH18)
Classification: Main-belt Asteroid          SPK-ID: 2058640
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 .09327310517691044 3.6347e-08  
a 2.405123385896852 1.0806e-08 au
q 2.180790059360648 8.6367e-08 au
i 7.155815130068478 7.4004e-06 deg
node 19.580075841274 3.3347e-05 deg
peri 262.0759983473187 5.3725e-05 deg
M 24.7348122648011 4.1039e-05 deg
tp 2458506.892512999676
(2019-Jan-23.39251300)
0.00015542 TDB
period 1362.399478085855
3.73
9.1819e-06
2.514e-08
d
yr
n .264239678442767 1.7808e-09 deg/d
Q 2.629456712433056 1.1814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      10096 days (27.64 yr)  
   first obs. used      1992-04-04  
   last obs. used      2019-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54473  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 05:07:28  

Additional Information
 Earth MOID = 1.17819 au 
 Jupiter MOID = 2.48531 au 
 T_jup = 3.507 
[ 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 15.2   n/a MPO502541  
diameter diameter 2.225 km 0.562 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.247   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58640 (1997 WH18)          Discovered 1997-Nov-23 by Spacewatch at Kitt Peak
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WH18 = 1992 GP2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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