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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783703992969842 4.4648e-08  
a 3.1427047337157 2.1592e-08 AU
q 2.582139235490308 1.3915e-07 AU
i 1.330528668318486 5.7381e-06 deg
node 20.82538808353965 0.00022801 deg
peri 43.57903331841169 0.00022862 deg
M 77.18108024345206 1.7054e-05 deg
tp 2456564.223170469091
(2013-Sep-28.72317047)
9.5795e-05 JED
period 2034.950251223671
5.57
2.0972e-05
5.742e-08
d
yr
n .1769085017108022 1.8232e-09 deg/d
Q 3.703270231941091 2.5444e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1352  
   data-arc span      31163 days (85.32 yr)  
   first obs. used      1929-11-27  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51461  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:11:37  

Additional Information
 Earth MOID = 1.59539 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 11.8 mag n/a PDS3 (MPC 17266)  
rotation period rot_per 12.5 h n/a LCDB (Rev. 2015-May); 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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