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4826 Wilhelms (1988 JO)
Classification: Main-belt Asteroid          SPK-ID: 2004826
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1925505002014141 1.8834e-08  
a 2.378563936131056 1.0272e-08 au
q 1.920570260467977 4.4765e-08 au
i 25.31860259426164 5.4928e-07 deg
node 95.52668604899247 1.7503e-06 deg
peri 223.5413056721852 3.7585e-06 deg
M 256.0041525590841 5.239e-06 deg
tp 2459587.565237652635
(2022-Jan-08.06523765)
2.1773e-05 TDB
period 1339.894707181604
3.67
8.6796e-06
2.376e-08
d
yr
n .2686778282431167 1.7404e-09 deg/d
Q 2.836557611794136 1.225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2629  
   data-arc span      13969 days (38.25 yr)  
   first obs. used      1982-12-22  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:53:12  

Additional Information
 Earth MOID = .951363 au 
 Jupiter MOID = 2.48439 au 
 T_jup = 3.387 
[ 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 12.71   n/a MPCxxxxx  
diameter diameter 7.926 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 54. 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.338   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4826 Wilhelms (1988 JO)          Discovered 1988-May-11 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1988 JO = 1982 YX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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