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3638 Davis (1984 WX)
Classification: Main-belt Asteroid          SPK-ID: 2003638
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07627399877679204 3.1211e-08  
a 3.012084822004342 1.654e-08 au
q 2.782341067975189 9.0312e-08 au
i 11.30999279369369 3.1964e-06 deg
node 108.9295334541034 1.9512e-05 deg
peri 167.1433161416997 3.1658e-05 deg
M 73.51492345249409 2.5237e-05 deg
tp 2458610.582944727806
(2019-May-07.08294473)
0.00013368 TDB
period 1909.410134783015
5.23
1.5727e-05
4.306e-08
d
yr
n .1885399021624604 1.553e-09 deg/d
Q 3.241828576033495 1.7801e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2821  
   data-arc span      14455 days (39.58 yr)  
   first obs. used      1981-03-31  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40082  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:58:38  

Additional Information
 Earth MOID = 1.76705 au 
 Jupiter MOID = 1.89925 au 
 T_jup = 3.215 
[ 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 11.5   n/a MPO435732  
diameter diameter 17.804 km 3.766 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 8.9 h n/a LCDB (Rev. 2019-August); 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:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
geometric albedo albedo 0.158   0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3638 Davis (1984 WX)          Discovered 1984-Nov-20 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1984 WX = 1981 FL1 = 1984 YM2 = 1986 CN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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