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21416 Sisichen (1998 FN70)
Classification: Main-belt Asteroid          SPK-ID: 2021416
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .151441048824614 3.3065e-08  
a 2.413358543304199 8.498e-09 au
q 2.047876994316368 7.9586e-08 au
i 6.517905271540169 4.2269e-06 deg
node 30.80692905615057 2.6545e-05 deg
peri 292.5325776680534 2.9644e-05 deg
M 318.2195907136207 1.4284e-05 deg
tp 2459555.428355064380
(2021-Dec-06.92835506)
5.4639e-05 TDB
period 1369.402760777385
3.75
7.233e-06
1.98e-08
d
yr
n .2628883264377491 1.3885e-09 deg/d
Q 2.778840092292029 9.785e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1615  
   data-arc span      13457 days (36.84 yr)  
   first obs. used      1984-09-23  
   last obs. used      2021-07-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53952  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 23:28:13  

Additional Information
 Earth MOID = 1.04606 au 
 Jupiter MOID = 2.55447 au 
 T_jup = 3.494 
[ 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 14.83   n/a E2021B10  

21416 Sisichen           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sisi Monica Chen (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for her mathematics project. She attends the Northview High School, Duluth, Georgia.
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

Alternate Designations
 1998 FN70 = 1984 SO6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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