Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647445701817853 3.8706e-08  
a 2.36040071691505 9.8326e-09 au
q 1.971537515350102 9.2895e-08 au
i 2.317233731517285 5.4305e-06 deg
node 5.485018524009816 9.158e-05 deg
peri 229.1890888032746 9.2885e-05 deg
M 75.92368124244398 1.5598e-05 deg
tp 2458921.147996734055
(2020-Mar-12.64799673)
5.6911e-05 TDB
period 1324.576463232922
3.63
8.2765e-06
2.266e-08
d
yr
n .2717849893854677 1.6982e-09 deg/d
Q 2.749263918479998 1.1452e-08 au
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      9656 days (26.44 yr)  
   first obs. used      1994-03-04  
   last obs. used      2020-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5717  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:56:51  

Additional Information
 Earth MOID = .959882 au 
 Jupiter MOID = 2.25163 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 15.77   n/a E2020-QM5  

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 20:16 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin