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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 
[ 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

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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
1904-Aug-26 14:16 00:02 Jupiter 1.95286212046434 1.95286196952847 1.95286227140055 3.89000068480906 3.77685550692322 2416719.094713601 1.6129863118049 53.1044344730142 3.56342470113686 88.3621621314653 9099156.05209008 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:37:23 2021-Apr-12 12:37
2058-May-03 23:07 < 00:01 Jupiter 1.95185624172232 1.95185612421116 1.95185635923415 3.43930813214877 3.31072885862027 2472852.463176247 0.711630882519539 76.3863795832759 2.35621427047477 -84.5796575664545 11255486.46464 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:37:23 2021-Apr-12 12:37
2082-Aug-22 01:12 00:01 Jupiter 1.94138522443672 1.94138508666664 1.94138536220679 3.94496955942232 3.8327782095592 2481728.550185504 1.077052933322 22.0737156653639 4.39160053987391 -89.8974740404332 6441602.15146878 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 12:37:23 2021-Apr-12 12:37

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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