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JPL Small-Body Database Browser
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21469 Robschum (1998 HO97)
Classification: Main-belt Asteroid          SPK-ID: 2021469
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642116947532615 3.9686e-08  
a 2.360045768893074 9.9103e-09 au
q 1.972498653487879 9.536e-08 au
i 2.316833550248597 5.5288e-06 deg
node 5.519414279621517 9.1637e-05 deg
peri 229.1772105449119 9.2984e-05 deg
M 272.8310937332027 1.5791e-05 deg
tp 2458921.155106867786
(2020-Mar-12.65510687)
5.8647e-05 TDB
period 1324.277697360219
3.63
8.3413e-06
2.284e-08
d
yr
n .2718463058900825 1.7123e-09 deg/d
Q 2.74759288429827 1.1538e-08 au
  Orbit Determination Parameters
   # obs. used (total)      813  
   data-arc span      9100 days (24.91 yr)  
   first obs. used      1994-03-04  
   last obs. used      2019-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57264  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:56:28  

Additional Information
 Earth MOID = .962133 au 
 Jupiter MOID = 2.25484 au 
 T_jup = 3.532 
[ 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 15.8   n/a MPO431748  

21469 Robschum           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Schumacher mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Pierson High School, Sag Harbor, New York.
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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