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20322 (1998 HZ20)
Classification: Main-belt Asteroid          SPK-ID: 2020322
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2214598931361459 3.2697e-08  
a 2.394320412577718 6.9397e-09 au
q 1.864074469874563 7.7969e-08 au
i 4.598264711072095 2.8386e-06 deg
node 65.26249257376715 4.7289e-05 deg
peri 302.877206701411 4.7759e-05 deg
M 282.0259601982334 7.0866e-06 deg
tp 2459689.602392626561
(2022-Apr-20.10239263)
2.7233e-05 TDB
period 1353.230660022459
3.70
5.8833e-06
1.611e-08
d
yr
n .2660300351116973 1.1566e-09 deg/d
Q 2.924566355280872 8.4766e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1759  
   data-arc span      14457 days (39.58 yr)  
   first obs. used      1981-12-04  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53294  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:02:29  

Additional Information
 Earth MOID = .867483 au 
 Jupiter MOID = 2.54548 au 
 T_jup = 3.492 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.71   n/a E2021B10  
rotation period rot_per 35.412 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20322 (1998 HZ20)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HZ20 = 1981 XJ1 = 1992 UV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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