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18813 (1999 KH15)
Classification: Main-belt Asteroid          SPK-ID: 2018813
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1347841483261117 7.6612e-09  
a 2.592890496919719 9.8511e-09 au
q 2.243409959589526 1.7468e-08 au
i 12.96654131067803 3.9181e-07 deg
node 212.578594025899 1.1339e-06 deg
peri 33.62938146392325 9.0353e-06 deg
M 86.35850436582338 7.9329e-06 deg
tp 2458834.671697094607
(2019-Dec-17.17169709)
3.301e-05 TDB
period 1525.017020767921
4.18
8.691e-06
2.379e-08
d
yr
n .2360629390344262 1.3453e-09 deg/d
Q 2.942371034249911 1.1179e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2412  
   data-arc span      16041 days (43.92 yr)  
   first obs. used      1977-02-17  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44192  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:38:34  

Additional Information
 Earth MOID = 1.24134 au 
 Jupiter MOID = 2.0789 au 
 T_jup = 3.370 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.15   n/a E2021B10  
diameter diameter 7.596 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.27989 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.]
geometric albedo albedo 0.232   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18813 (1999 KH15)          Discovered 1999-May-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 KH15 = 1977 DJ = 1998 FS74 = 2000 RX49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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