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21391 Rotanner (1998 FY31)
Classification: Main-belt Asteroid          SPK-ID: 2021391
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06396306557482574 3.5442e-08  
a 2.233065913049748 6.7177e-09 au
q 2.090232171620439 8.0106e-08 au
i 3.69765925800441 3.8892e-06 deg
node 194.5610847940214 5.136e-05 deg
peri 356.9386906104817 5.7799e-05 deg
M 280.5006413805473 2.693e-05 deg
tp 2459469.660833433444
(2021-Sep-12.16083343)
9.1384e-05 TDB
period 1218.851343189702
3.34
5.5e-06
1.506e-08
d
yr
n .2953600551958119 1.3328e-09 deg/d
Q 2.375899654479057 7.1474e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1186  
   data-arc span      16162 days (44.25 yr)  
   first obs. used      1976-10-22  
   last obs. used      2021-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5545  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:52:21  

Additional Information
 Earth MOID = 1.08884 au 
 Jupiter MOID = 2.57915 au 
 T_jup = 3.635 
[ 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 MPO337439  

21391 Rotanner           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Roberta Tanner (b. 1953), a 2004 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the Loveland High School, Longmont, Colorado, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

Alternate Designations
 1998 FY31 = 1976 UJ6 = 1999 RJ141 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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