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22588 (1998 HW99)
Classification: Main-belt Asteroid          SPK-ID: 2022588
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1256973083287767 4.7092e-08  
a 2.697188766094557 1.3236e-08 au
q 2.358159398141856 1.2667e-07 au
i 13.96818897065443 5.1585e-06 deg
node 55.67010294886813 1.7834e-05 deg
peri 187.65288928391 2.6134e-05 deg
M 22.14429488332438 1.8793e-05 deg
tp 2459100.976693707839
(2020-Sep-08.47669371)
8.4501e-05 TDB
period 1617.95128063248
4.43
1.191e-05
3.261e-08
d
yr
n .2225036095396339 1.6379e-09 deg/d
Q 3.036218134047257 1.49e-08 au
  Orbit Determination Parameters
   # obs. used (total)      913  
   data-arc span      14750 days (40.38 yr)  
   first obs. used      1980-02-21  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53283  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:57  

Additional Information
 Earth MOID = 1.34484 au 
 Jupiter MOID = 1.97538 au 
 T_jup = 3.315 
[ 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 14.69   n/a E2021B10  
diameter diameter 3.598 km 0.930 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.237   0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22588 (1998 HW99)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HW99 = 1980 DQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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