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21146 (1993 FD67)
Classification: Main-belt Asteroid          SPK-ID: 2021146
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2089958628614517 3.4208e-08  
a 2.691612589845156 1.1865e-08 au
q 2.129076694141721 9.4084e-08 au
i 1.745717816568494 3.7589e-06 deg
node 276.8284852472556 0.00013514 deg
peri 72.62356695052735 0.00013548 deg
M 305.1590546115132 1.2046e-05 deg
tp 2459446.208219861101
(2021-Aug-19.70821986)
5.4959e-05 TDB
period 1612.936438702723
4.42
1.0665e-05
2.92e-08
d
yr
n .223195403961204 1.4759e-09 deg/d
Q 3.254148485548591 1.4345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1378  
   data-arc span      10403 days (28.48 yr)  
   first obs. used      1992-01-02  
   last obs. used      2020-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50069  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:30  

Additional Information
 Earth MOID = 1.12191 au 
 Jupiter MOID = 2.18365 au 
 T_jup = 3.339 
[ 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 14.31   n/a E2021B10  
rotation period rot_per 2.53 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

21146 (1993 FD67)          Discovered 1993-Mar-21 by UESAC at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 FD67 = 1999 XX20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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