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21420 (1998 FL74)
Classification: Main-belt Asteroid          SPK-ID: 2021420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1851491611343898 2.6083e-08  
a 2.282136781292557 6.5499e-09 au
q 1.859601070642304 6.0082e-08 au
i 5.773153972810731 4.3442e-06 deg
node 349.2931942848461 3.2627e-05 deg
peri 299.6372348989993 3.4978e-05 deg
M 107.253676852378 1.3502e-05 deg
tp 2458825.336463174978
(2019-Dec-07.83646317)
4.6876e-05 TDB
period 1259.247022765481
3.45
5.4212e-06
1.484e-08
d
yr
n .2858851309486444 1.2308e-09 deg/d
Q 2.70467249194281 7.7627e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1231  
   data-arc span      8812 days (24.13 yr)  
   first obs. used      1996-12-02  
   last obs. used      2021-01-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:45:22  

Additional Information
 Earth MOID = .849811 au 
 Jupiter MOID = 2.49266 au 
 T_jup = 3.575 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.64   n/a E2021B10  

21420 (1998 FL74)          Discovered 1998-Mar-21 by Bickel, W. at Bergisch Gladbach
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 FL74 = 1999 RS27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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