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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 ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .007111866781212349 3.587e-08  
a 2.629589030644718 1.1113e-08 au
q 2.610887743769436 9.488e-08 au
i 1.821647823936995 4.0314e-06 deg
node 255.8636412172314 0.00013938 deg
peri 4.787648940509039 0.00044325 deg
M 174.0423203508026 0.00042304 deg
tp 2457847.521440888171
(2017-Apr-04.02144089)
0.0018296 TDB
period 1557.507856329889
4.26
9.8731e-06
2.703e-08
d
yr
n .2311384809629814 1.4652e-09 deg/d
Q 2.648290317520001 1.1192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1671  
   data-arc span      10897 days (29.83 yr)  
   first obs. used      1989-12-30  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5386  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:03:17  

Additional Information
 Earth MOID = 1.5946 au 
 Jupiter MOID = 2.32554 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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