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JPL Small-Body Database Browser
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27993 (1997 WK)
Classification: Main-belt Asteroid          SPK-ID: 2027993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .007169972149436211 3.2113e-08  
a 2.62900732119774 1.0151e-08 au
q 2.610157411924088 8.6783e-08 au
i 1.821612183242087 3.5254e-06 deg
node 255.8617612868182 0.00012907 deg
peri 7.1695908949292 0.00043392 deg
M 264.1107248123672 0.00041703 deg
tp 2459415.218735108353
(2021-Jul-19.71873511)
0.0018042 TDB
period 1556.99106440073
4.26
9.0175e-06
2.469e-08
d
yr
n .2312151997728775 1.3391e-09 deg/d
Q 2.647857230471391 1.0224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1825  
   data-arc span      10994 days (30.10 yr)  
   first obs. used      1989-12-30  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51701  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:14:11  

Additional Information
 Earth MOID = 1.59421 au 
 Jupiter MOID = 2.32565 au 
 T_jup = 3.400 
[ 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 13.9   n/a MPO324567  

27993 (1997 WK)          Discovered 1997-Nov-18 by Kobayashi, T. at Oizumi
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WK = 1989 YJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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