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17990 (1999 JK64)
Classification: Main-belt Asteroid          SPK-ID: 2017990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1532480194604515 1.5168e-08  
a 2.7334741367307 1.1829e-08 au
q 2.314574639030353 4.5086e-08 au
i 8.386472386692926 4.3113e-07 deg
node 69.7601085175116 2.8623e-06 deg
peri 178.2703771648735 8.5933e-06 deg
M 279.7440923701969 9.7347e-06 deg
tp 2459568.497942376779
(2021-Dec-19.99794238)
4.5493e-05 TDB
period 1650.710373455975
4.52
1.0715e-05
2.934e-08
d
yr
n .2180879249254935 1.4157e-09 deg/d
Q 3.152373634431047 1.3642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2443  
   data-arc span      15441 days (42.28 yr)  
   first obs. used      1978-11-30  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43793  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:19:10  

Additional Information
 Earth MOID = 1.29925 au 
 Jupiter MOID = 1.87706 au 
 T_jup = 3.321 
[ 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 13.61   n/a E2021B10  
rotation period rot_per 53.1523 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

17990 (1999 JK64)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JK64 = 1978 WV18 = 1991 SP4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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