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18692 (1998 HJ14)
Classification: Main-belt Asteroid          SPK-ID: 2018692
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1019290973822145 3.9432e-08  
a 3.064422299893092 1.7339e-08 au
q 2.752068500867059 1.2725e-07 au
i 11.84868323938497 4.068e-06 deg
node 122.2528506757552 1.8475e-05 deg
peri 155.3607094239441 2.7886e-05 deg
M 17.0252675910393 1.875e-05 deg
tp 2459107.835626518535
(2020-Sep-15.33562652)
0.00010227 TDB
period 1959.392078564734
5.36
1.6629e-05
4.553e-08
d
yr
n .1837304559604538 1.5593e-09 deg/d
Q 3.376776098919125 1.9106e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1654  
   data-arc span      10427 days (28.55 yr)  
   first obs. used      1992-02-24  
   last obs. used      2020-09-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49689  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:14  

Additional Information
 Earth MOID = 1.73851 au 
 Jupiter MOID = 1.8186 au 
 T_jup = 3.192 
[ 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 13.48   n/a E2021B10  
diameter diameter 6.462 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.07 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
geometric albedo albedo 0.202   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18692 (1998 HJ14)          Discovered 1998-Apr-22 by JPL/GEODSS NEAT at Haleakala
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HJ14 = 1997 CM3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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