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4908 Ward (1933 SD)
Classification: Main-belt Asteroid          SPK-ID: 2004908
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338062599388311 4.2884e-08  
a 2.188888202266148 5.0655e-09 au
q 1.677112438270068 9.3903e-08 au
i 4.571872696581993 4.5095e-06 deg
node 190.1672830658546 3.8567e-05 deg
peri 165.9659419974266 3.9093e-05 deg
M 278.3622333062649 7.1727e-06 deg
tp 2459268.739303259163
(2021-Feb-23.23930326)
2.4067e-05 TDB
period 1182.861230581769
3.24
4.106e-06
1.124e-08
d
yr
n .3043467743235954 1.0565e-09 deg/d
Q 2.700663966262228 6.2498e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2160  
   data-arc span      31635 days (86.61 yr)  
   first obs. used      1933-09-17  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49651  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:14:04  

Additional Information
 Earth MOID = .673374 au 
 Jupiter MOID = 2.75052 au 
 T_jup = 3.634 
[ 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 13.7   n/a MPO332865  
diameter diameter 4.903 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.96 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:
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2003) Abstracts of Photometry and Polarimetry of Asteroids: Impact on Collaboration, Kharkiv, 9-10.]
geometric albedo albedo 0.327   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4908 Ward (1933 SD)          Discovered 1933-Sep-17 by Rigaux, F. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1933 SD = 1972 TK2 = 1978 NC4 = 1988 PU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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