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18722 (1998 HF148)
Classification: Main-belt Asteroid          SPK-ID: 2018722
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08037905939578269 4.0444e-08  
a 3.190866795907714 1.9877e-08 au
q 2.934387924195417 1.3159e-07 au
i 2.22720344751374 4.7509e-06 deg
node 185.0385126415446 8.8264e-05 deg
peri 153.4343918595714 9.176e-05 deg
M 248.0558110471515 2.7156e-05 deg
tp 2459847.881809860300
(2022-Sep-25.38180986)
0.00015953 TDB
period 2081.907544552161
5.70
1.9454e-05
5.326e-08
d
yr
n .1729183416151362 1.6158e-09 deg/d
Q 3.447345667620011 2.1475e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1329  
   data-arc span      9811 days (26.86 yr)  
   first obs. used      1993-07-13  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53574  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:53  

Additional Information
 Earth MOID = 1.92363 au 
 Jupiter MOID = 1.8755 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 13.91   n/a E2021B10  
diameter diameter 10.110 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18722 (1998 HF148)          Discovered 1998-Apr-25 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HF148 = 1993 OZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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