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17868 (1998 KW46)
Classification: Main-belt Asteroid          SPK-ID: 2017868
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09453293285448162 3.731e-08  
a 3.097327438055387 2.0424e-08 au
q 2.804527991325354 1.2185e-07 au
i 11.56174815998852 4.0837e-06 deg
node 244.7769275507142 2.0227e-05 deg
peri 70.806293225742 2.9356e-05 deg
M 317.6954837216816 2.2229e-05 deg
tp 2459234.471704732559
(2021-Jan-19.97170473)
0.00012361 TDB
period 1991.035972367097
5.45
1.9693e-05
5.392e-08
d
yr
n .1808103946871459 1.7884e-09 deg/d
Q 3.390126884785421 2.2354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1626  
   data-arc span      15170 days (41.53 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47738  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:16:28  

Additional Information
 Earth MOID = 1.81737 au 
 Jupiter MOID = 1.86081 au 
 T_jup = 3.185 
[ 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 12.7   n/a MPO435865  
diameter diameter 15.278 km 0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.681 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.076   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

17868 (1998 KW46)          Discovered 1998-May-22 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 KW46 = 1978 WS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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