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1540 Kevola (1938 WK)
Classification: Main-belt Asteroid          SPK-ID: 2001540
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08546031904433087 1.6767e-08  
a 2.848726628561962 1.0277e-08 au
q 2.605273542014976 5.2809e-08 au
i 11.96997605013593 3.6559e-07 deg
node 52.46560993444044 6.7743e-07 deg
peri 112.5373049898593 8.9396e-06 deg
M 284.4474122542434 1.1383e-05 deg
tp 2459569.071230692434
(2021-Dec-20.57123069)
5.6378e-05 TDB
period 1756.202494291515
4.81
9.5036e-06
2.602e-08
d
yr
n .2049877512246848 1.1093e-09 deg/d
Q 3.092179715108948 1.1155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3060  
   data-arc span      34668 days (94.92 yr)  
   first obs. used      1926-04-14  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41254  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:35:26  

Additional Information
 Earth MOID = 1.63713 au 
 Jupiter MOID = 1.94218 au 
 T_jup = 3.269 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456791.5 (2014-May-14.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08412544022191866 1.6745e-08  
q 2.609766769020535 5.2772e-08 au
tp 2456061.702606660155
(2012-May-14.20260666)
5.226e-05 TDB
node 52.4995617026084 6.7805e-07 deg
peri 113.5765797020338 9.1773e-06 deg
i 11.9656014834987 3.655e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3060  
   data-arc span      34668 days (94.92 yr)  
   first obs. used      1926-04-14  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41254  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:35:26  

Additional Information
 Jupiter MOID = 1.94218 au 
 T_jup = 3.269 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.803964005988898E-16 -8.724839013531177E-16 -6.217976746582444E-13 -5.231803206030462E-15 -1.031974368102904E-13 -2.416980313931867E-15
q -8.724839013531177E-16 2.784913431126182E-15 1.827430224425863E-12 1.582944137643098E-14 3.097955382659502E-13 7.579419252082114E-15
tp -6.217976746582444E-13 1.827430224425863E-12 2.731066941328921E-9 1.284523860256266E-11 4.752004399607149E-10 9.506197113480776E-12
node -5.231803206030462E-15 1.582944137643098E-14 1.284523860256266E-11 4.597564349871529E-13 1.94270453379115E-12 9.289984103131249E-14
peri -1.031974368102904E-13 3.097955382659502E-13 4.752004399607149E-10 1.94270453379115E-12 8.422267915163888E-11 1.63967176998112E-12
i -2.416980313931867E-15 7.579419252082114E-15 9.506197113480776E-12 9.289984103131249E-14 1.63967176998112E-12 1.335905045855831E-13

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 10.84   n/a E2021B10  
diameter diameter 43.875 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 20.082 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.048   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1540 Kevola (1938 WK)          Discovered 1938-Nov-16 by Oterma, L. at Turku
Nov. 16 observation seems to be a prediscovery.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 WK = 1926 GT = 1933 UM = 1933 WR = 1936 KL = 1937 QG = 1940 EJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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