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2803 Vilho (1940 WG)
Classification: Main-belt Asteroid          SPK-ID: 2002803
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1786980969354052 4.3617e-08  
a 3.13975697390476 2.0759e-08 au
q 2.578688377828312 1.3462e-07 au
i 1.330578612509112 5.7367e-06 deg
node 20.82119461712351 0.00021862 deg
peri 43.27890696481727 0.00021924 deg
M 148.3258856472228 1.7118e-05 deg
tp 2456563.246586396858
(2013-Sep-27.74658640)
9.4986e-05 JED
period 2032.087842131652
5.56
2.0153e-05
5.518e-08
d
yr
n .1771576959106066 1.7569e-09 deg/d
Q 3.700825569981207 2.4468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1401  
   data-arc span      31249 days (85.56 yr)  
   first obs. used      1929-11-27  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51479  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:43:41  

Additional Information
 Earth MOID = 1.59137 au 
 Jupiter MOID = 1.63353 au 
 T_jup = 3.185 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.9 mag n/a MPO337272  
rotation period rot_per 12.5 h n/a LCDB (Rev. 2015-December); 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:
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

2803 Vilho (1940 WG)          Discovered 1940-Nov-29 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1940 WG = 1929 XM = 1962 VE = 1973 SD5 = 1976 GF5 = 1977 KC1 = 1978 ND5 = 1979 SZ11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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