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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06387916643350858 3.4374e-08  
a 2.23301833259874 6.6024e-09 au
q 2.09037498288159 7.8049e-08 au
i 3.697897489752667 3.7131e-06 deg
node 194.5544191004711 5.1055e-05 deg
peri 356.9082724024539 5.7494e-05 deg
M 338.4189078102164 2.6808e-05 deg
tp 2459469.564729180050
(2021-Sep-12.06472918)
9.081e-05 TDB
period 1218.812387876722
3.34
5.4055e-06
1.48e-08
d
yr
n .2953694954045811 1.31e-09 deg/d
Q 2.375661682315891 7.0241e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1238  
   data-arc span      16237 days (44.45 yr)  
   first obs. used      1976-10-22  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:32:51  

Additional Information
 Earth MOID = 1.09045 au 
 Jupiter MOID = 2.57843 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 15.54   n/a MPCxxxxx  

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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