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22571 Letianzhang (1998 HA39)
Classification: Main-belt Asteroid          SPK-ID: 2022571
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225944620309367 2.96e-08  
a 2.238960700236839 5.6561e-09 au
q 1.964476517682894 6.5574e-08 au
i 4.777074103032868 3.1182e-06 deg
node 213.5002033757449 4.2591e-05 deg
peri 232.8646595872688 4.5227e-05 deg
M 21.1273404659719 1.4727e-05 deg
tp 2459128.685777483942
(2020-Oct-06.18577748)
5.0005e-05 TDB
period 1223.680763199726
3.35
4.637e-06
1.27e-08
d
yr
n .2941943771827047 1.1148e-09 deg/d
Q 2.513444882790783 6.3496e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1345  
   data-arc span      16211 days (44.38 yr)  
   first obs. used      1976-10-24  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51377  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:42  

Additional Information
 Earth MOID = .984482 au 
 Jupiter MOID = 2.67811 au 
 T_jup = 3.622 
[ 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 15.5   n/a MPO337449  
diameter diameter 3.086 km 0.665 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.094   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

22571 Letianzhang           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Letian Zhang (b. 1988) is a finalist in the 2006 Intel Science Talent Search (STS), a science competition for high school seniors, for his mathematics project. He attends the Illinois Mathematics & Science Academy, Aurora, Illinois.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060314/MPCPages.arcLast Updated: 2006-03-23

Alternate Designations
 1998 HA39 = 1976 UE20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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