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

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1789132601809693 3.5408e-08  
a 3.141523710320939 1.5046e-08 au
q 2.579463461371605 1.1388e-07 au
i 1.329954384752857 4.8119e-06 deg
node 20.81676810437094 0.00015641 deg
peri 43.00291997431323 0.00015695 deg
M 1.18668151298269 1.2381e-05 deg
tp 2458593.795897965044
(2019-Apr-20.29589796)
6.994e-05 TDB
period 2033.803262442336
5.57
1.4612e-05
4.001e-08
d
yr
n .1770082714724759 1.2717e-09 deg/d
Q 3.703583959270274 1.7739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2262  
   data-arc span      32879 days (90.02 yr)  
   first obs. used      1929-11-27  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49317  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:40  

Additional Information
 Earth MOID = 1.5927 au 
 Jupiter MOID = 1.6259 au 
 T_jup = 3.185 
[ 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 12.0   n/a MPO502180  
diameter diameter 21.441 km 0.301 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.5 h n/a LCDB (Rev. 2019-January); 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]
geometric albedo albedo 0.073   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1961-Aug-30 21:40 00:01 Jupiter 1.82474233044613 1.82474168894256 1.82474297194959 2.66500668205504 2.48473050577269 2437542.403059141 1.37543463569232 52.6191515714464 12.2914411155005 84.9817938082779 1948177.49790377 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
1972-Feb-20 02:27 00:01 Jupiter 1.66973322733259 1.66973289620389 1.669733558461 1.63680755511574 1.29018552151419 2441367.602032530 1.06585743898858 63.4495518957747 48.1679513012439 80.5694239371551 2584958.86412986 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
1982-Aug-21 09:04 < 00:01 Jupiter 1.79135152283936 1.79135106728802 1.7913519783906 1.84441384439547 1.56722129380337 2445202.877615417 0.758846015046486 62.1771763964646 21.530538628743 -86.2170867144541 2460750.4900886 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2056-Oct-08 16:03 < 00:01 Jupiter 1.8384860144558 1.83848547903716 1.83848654987434 2.77735947698351 2.60620237959422 2472280.168430248 0.948895386851768 47.5970289504071 12.6752883918681 87.0621699424516 2268147.01962196 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2067-Mar-29 00:47 00:01 Jupiter 1.66341313881225 1.66341280431737 1.66341347330685 1.66053015732968 1.31869075955068 2476103.532531525 1.22453145609864 64.3967159765668 52.4050142266429 76.8744284783117 2372988.90676046 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2077-Sep-26 08:58 00:02 Jupiter 1.77460934029964 1.77460869027398 1.77460999032519 1.80077534110788 1.51267649012587 2479937.873722116 1.51057650434158 71.6853935350853 24.9532323418576 -83.6657275101314 2211133.94365791 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2151-Nov-16 03:59 00:03 Jupiter 1.84260929206926 1.84260800384452 1.84261058029463 2.86302842031404 2.69769509853182 2507015.665901683 3.23733051430041 101.294597030854 16.744559785241 75.464052098978 1760088.06625163 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2162-May-04 12:17 00:03 Jupiter 1.65762202145445 1.65762160048071 1.65762244242752 1.68772646308364 1.35146127026794 2510838.011827756 3.48506258170668 92.4135079791332 64.5663688851449 -8.46432587237298 1414536.33042481 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21
2172-Oct-31 10:11 00:04 Jupiter 1.7562020046286 1.756200733353 1.7562032759036 1.75807734253373 1.45815938096995 2514670.924633889 3.73728478246004 107.057393105587 31.9879141981711 -73.1903963337074 1722543.18008769 T 27 CATAB v2.0f-lin.ifort 2019-Dec-13 21:20:55 2019-Dec-13 21:21

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