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20222 (1997 HP11)
Classification: Main-belt Asteroid          SPK-ID: 2020222
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0809923033137427 2.6742e-08  
a 2.922958757903144 1.0979e-08 au
q 2.686221595609492 7.9412e-08 au
i 1.457058547333242 3.4394e-06 deg
node 326.9304249903391 0.00012199 deg
peri 108.8557498046834 0.00012469 deg
M 43.18949982650496 2.4346e-05 deg
tp 2458981.518144123574
(2020-May-12.01814412)
0.00012336 TDB
period 1825.292453772159
5.00
1.0284e-05
2.816e-08
d
yr
n .1972286683462818 1.1112e-09 deg/d
Q 3.159695920196796 1.1868e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2191  
   data-arc span      10106 days (27.67 yr)  
   first obs. used      1993-07-13  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:21  

Additional Information
 Earth MOID = 1.70136 au 
 Jupiter MOID = 2.03168 au 
 T_jup = 3.274 
[ 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 14.07   n/a E2021B10  
diameter diameter 4.557 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.257   0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20222 (1997 HP11)          Discovered 1997-Apr-30 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 HP11 = 1993 ON14 = 1999 TQ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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