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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1011603628977233 4.0058e-08  
a 3.061873711332702 1.8079e-08 au
q 2.752133455547287 1.2827e-07 au
i 11.84745946452135 4.3674e-06 deg
node 122.2562428886367 2.0685e-05 deg
peri 155.5832220718644 3.0305e-05 deg
M 340.0713352051734 2.086e-05 deg
tp 2459108.831570544657
(2020-Sep-16.33157054)
0.00011327 TDB
period 1956.948234996685
5.36
1.7332e-05
4.745e-08
d
yr
n .1839598991746503 1.6293e-09 deg/d
Q 3.371613967118118 1.9907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1486  
   data-arc span      10341 days (28.31 yr)  
   first obs. used      1992-02-24  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51322  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:24:48  

Additional Information
 Earth MOID = 1.74038 au 
 Jupiter MOID = 1.8244 au 
 T_jup = 3.193 
[ 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 13.4   n/a MPO347670  
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. 2019-August); 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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