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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08546031903842496 1.6766e-08  
a 2.848726628566491 1.0275e-08 au
q 2.605273542035942 5.2803e-08 au
i 11.9699760503232 3.6558e-07 deg
node 52.46560993446867 6.7743e-07 deg
peri 112.5373049876921 8.9391e-06 deg
M 284.4474122562139 1.1382e-05 deg
tp 2459569.071230683701
(2021-Dec-20.57123068)
5.6372e-05 TDB
period 1756.202494295704
4.81
9.5017e-06
2.601e-08
d
yr
n .2049877512241959 1.1091e-09 deg/d
Q 3.09217971509704 1.1153e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3068  
   data-arc span      34678 days (94.94 yr)  
   first obs. used      1926-04-14  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41201  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:33:34  

Additional Information
 Earth MOID = 1.63713 au 
 Jupiter MOID = 1.94218 au 
 T_jup = 3.269 
[ 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 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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