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JPL Small-Body Database Browser
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1522 Kokkola (1938 WO)
Classification: Main-belt Asteroid          SPK-ID: 2001522
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07266016655493274 2.9482e-08  
a 2.368243707011987 6.7453e-09 au
q 2.196166724817825 7.1292e-08 au
i 5.352039200257419 3.3574e-06 deg
node 60.61650473570509 3.8846e-05 deg
peri 30.27782632562831 5.1123e-05 deg
M 358.9924795709381 3.1213e-05 deg
tp 2458604.225541237804
(2019-Apr-30.72554124)
0.00011541 TDB
period 1331.183772480315
3.64
5.6872e-06
1.557e-08
d
yr
n .2704359889613389 1.1554e-09 deg/d
Q 2.540320689206149 7.2354e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2426  
   data-arc span      29631 days (81.13 yr)  
   first obs. used      1938-10-22  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43924  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:01:40  

Additional Information
 Earth MOID = 1.2144 au 
 Jupiter MOID = 2.58234 au 
 T_jup = 3.537 
[ 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 12.4   n/a MPO492768  
diameter diameter 9.422 km 0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.83 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
geometric albedo albedo 0.206   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.880   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.32 deg.
U-B UB 0.510   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.32 deg.

1522 Kokkola (1938 WO)          Discovered 1938-Nov-18 by Oterma, L. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1938 WO = 1949 WB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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