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21409 Forbes (1998 FC65)
Classification: Main-belt Asteroid          SPK-ID: 2021409
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 .1235181515319029 3.7369e-08  
a 2.276393398515904 7.3944e-09 au
q 1.995217493771793 8.5893e-08 au
i 5.570998591818627 4.0958e-06 deg
node 193.4954169566415 3.514e-05 deg
peri 44.35960494615933 3.821e-05 deg
M 241.5164394091696 1.7777e-05 deg
tp 2459809.381096269718
(2022-Aug-17.88109627)
6.3204e-05 TDB
period 1254.496353045975
3.43
6.1125e-06
1.674e-08
d
yr
n .286967753334558 1.3982e-09 deg/d
Q 2.557569303260015 8.3078e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1314  
   data-arc span      17095 days (46.80 yr)  
   first obs. used      1974-04-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:32:58  

Additional Information
 Earth MOID = .988547 au 
 Jupiter MOID = 2.43785 au 
 T_jup = 3.592 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457115.5 (2015-Apr-03.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1234297608282696 3.7428e-08  
q 1.995450859434635 8.5986e-08 au
tp 2457300.904065010319
(2015-Oct-05.40406501)
5.6299e-05 TDB
node 193.5373636445183 3.5129e-05 deg
peri 44.37766273639016 3.8199e-05 deg
i 5.571510457285501 4.0968e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1314  
   data-arc span      17095 days (46.80 yr)  
   first obs. used      1974-04-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:32:58  

Additional Information
 Jupiter MOID = 2.43785 au 
 T_jup = 3.592 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.400817795884794E-15 -3.209011436883988E-15 -4.582858642378368E-13 -4.909648163581664E-15 -1.148818224115011E-13 -5.659780930059063E-16
q -3.209011436883988E-15 7.393554694253183E-15 1.225288088415685E-12 1.154372202518803E-14 3.062737326952127E-13 1.373388417938876E-15
tp -4.582858642378368E-13 1.225288088415685E-12 3.169592147000127E-9 5.115459697224602E-12 8.541710141131588E-10 2.167125642289901E-13
node -4.909648163581664E-15 1.154372202518803E-14 5.115459697224602E-12 1.234071033865585E-9 -1.22639466606947E-9 3.449078593285458E-11
peri -1.148818224115011E-13 3.062737326952127E-13 8.541710141131588E-10 -1.22639466606947E-9 1.45915249617247E-9 -3.429074877540747E-11
i -5.659780930059063E-16 1.373388417938876E-15 2.167125642289901E-13 3.449078593285458E-11 -3.429074877540747E-11 1.678409090450565E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.24   n/a MPCxxxxx  

21409 Forbes           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Michael Andrew Forbes (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for his computer science project. He attends the Montgomery Blair High School, Silver Spring, Maryland.
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 FC65 = 1974 HV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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