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12285 (1991 FN2)
Classification: Main-belt Asteroid          SPK-ID: 2012285
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1015521879512044 3.8561e-08  
a 2.996524479999875 1.5958e-08 au
q 2.692220862806543 1.1883e-07 au
i 3.817938148149338 4.6335e-06 deg
node 157.4769196719563 5.0344e-05 deg
peri 335.8349510599498 5.3912e-05 deg
M 254.5204142226452 2.0586e-05 deg
tp 2459555.625384174855
(2021-Dec-07.12538417)
0.0001101 TDB
period 1894.633324829117
5.19
1.5135e-05
4.144e-08
d
yr
n .1900103810495731 1.5179e-09 deg/d
Q 3.300828097193208 1.7579e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      11370 days (31.13 yr)  
   first obs. used      1988-09-14  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51378  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:44:27  

Additional Information
 Earth MOID = 1.70695 au 
 Jupiter MOID = 1.7298 au 
 T_jup = 3.243 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456773.5 (2014-Apr-26.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09849222883105462 3.8976e-08  
q 2.70423484356484 1.199e-07 au
tp 2457661.763956863679
(2016-Sep-30.26395686)
0.00010777 TDB
node 157.5779259150123 5.0273e-05 deg
peri 336.1118789522344 5.4026e-05 deg
i 3.81831766858843 4.6365e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1528  
   data-arc span      11370 days (31.13 yr)  
   first obs. used      1988-09-14  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51378  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:44:27  

Additional Information
 Jupiter MOID = 1.7298 au 
 T_jup = 3.243 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.519164671207204E-15 -4.640080303477438E-15 8.55947565343384E-13 1.221372581433725E-15 2.033864106922584E-13 -5.431227845413526E-16
q -4.640080303477438E-15 1.437713996523873E-14 -2.143383181340077E-12 -7.176299628999692E-16 -5.568714633852599E-13 2.077739206134294E-15
tp 8.55947565343384E-13 -2.143383181340077E-12 1.161504165433294E-8 7.175542173171993E-12 2.134614678757874E-9 2.023737670102912E-12
node 1.221372581433725E-15 -7.176299628999692E-16 7.175542173171993E-12 2.527360579033573E-9 -2.520202497223611E-9 2.726127099399934E-11
peri 2.033864106922584E-13 -5.568714633852599E-13 2.134614678757874E-9 -2.520202497223611E-9 2.918820229360498E-9 -2.687351357741084E-11
i -5.431227845413526E-16 2.077739206134294E-15 2.023737670102912E-12 2.726127099399934E-11 -2.687351357741084E-11 2.149745241831326E-11

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 13.7   n/a MPO416845  

12285 (1991 FN2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 FN2 = 1988 RL11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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