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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09466708205539656 1.5144e-08  
a 3.098758843752627 1.8865e-08 au
q 2.805408386021211 4.8073e-08 au
i 11.55147559813766 4.1781e-07 deg
node 244.7266384230794 3.3732e-06 deg
peri 70.38142214703851 1.341e-05 deg
M 354.2510241799296 1.0975e-05 deg
tp 2459232.317648298793
(2021-Jan-17.81764830)
6.0772e-05 TDB
period 1992.416344416839
5.45
1.8195e-05
4.982e-08
d
yr
n .1806851268856503 1.65e-09 deg/d
Q 3.392109301484043 2.0651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1729  
   data-arc span      15337 days (41.99 yr)  
   first obs. used      1978-11-29  
   last obs. used      2020-11-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:16:23  

Additional Information
 Earth MOID = 1.81604 au 
 Jupiter MOID = 1.85607 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 12.80   n/a E2021B10  
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. 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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