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21473 Petesullivan (1998 HH99)
Classification: Main-belt Asteroid          SPK-ID: 2021473
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1295333080633729 3.1015e-08  
a 2.25697226287989 5.5694e-09 au
q 1.964619179461781 6.9776e-08 au
i 3.216875493943504 2.7902e-06 deg
node 90.75879394559993 6.388e-05 deg
peri 232.9575620126499 6.4969e-05 deg
M 154.5171779523551 1.182e-05 deg
tp 2458668.928086002139
(2019-Jul-04.42808600)
4.0693e-05 TDB
period 1238.476469575681
3.39
4.5842e-06
1.255e-08
d
yr
n .2906797253268291 1.0759e-09 deg/d
Q 2.549325346297998 6.2908e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2036  
   data-arc span      10885 days (29.80 yr)  
   first obs. used      1991-04-06  
   last obs. used      2021-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51182  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:52:48  

Additional Information
 Earth MOID = .952257 au 
 Jupiter MOID = 2.72841 au 
 T_jup = 3.610 
[ 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 14.62   n/a E2020-QM5  
diameter diameter 2.974 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.347   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21473 Petesullivan           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Peter Sullivan mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Roseville Area High School, Roseville, Minnesota.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

Alternate Designations
 1998 HH99 = 1992 SH24 = 1996 XK15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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