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18714 (1998 HQ114)
Classification: Main-belt Asteroid          SPK-ID: 2018714
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1029942324570372 4.4151e-08  
a 3.05890729995128 2.2978e-08 au
q 2.74385749043557 1.3975e-07 au
i 12.43690224206418 4.7952e-06 deg
node 89.10476155547647 2.4997e-05 deg
peri 156.5147624446288 3.6348e-05 deg
M 54.18183888441958 2.6201e-05 deg
tp 2458906.397212683001
(2020-Feb-26.89721268)
0.00014227 TDB
period 1954.105021425645
5.35
2.2019e-05
6.028e-08
d
yr
n .1842275599585517 2.0758e-09 deg/d
Q 3.37395710946699 2.5345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1051  
   data-arc span      9937 days (27.21 yr)  
   first obs. used      1993-05-29  
   last obs. used      2020-08-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:48  

Additional Information
 Earth MOID = 1.73277 au 
 Jupiter MOID = 1.69742 au 
 T_jup = 3.191 
[ 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 13.86   n/a MPCxxxxx  
diameter diameter 5.753 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.194   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18714 (1998 HQ114)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HQ114 = 2000 SH238 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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