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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07251773340956519 2.9145e-08  
a 2.367669538018256 6.6764e-09 au
q 2.195971509658299 7.0352e-08 au
i 5.351972929715755 3.3391e-06 deg
node 60.61173955701695 3.8847e-05 deg
peri 30.09894906163491 5.1094e-05 deg
M 107.37002120466 3.1116e-05 deg
tp 2458603.618738055520
(2019-Apr-30.11873806)
0.00011536 TDB
period 1330.699693424403
3.64
5.6285e-06
1.541e-08
d
yr
n .2705343675803976 1.1443e-09 deg/d
Q 2.539367566378212 7.1606e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2479  
   data-arc span      29662 days (81.21 yr)  
   first obs. used      1938-10-22  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43436  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:05:15  

Additional Information
 Earth MOID = 1.21418 au 
 Jupiter MOID = 2.58203 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-August); 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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