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344082 (1998 SF21)
Classification: Main-belt Asteroid          SPK-ID: 2344082
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1102824457057927 8.8179e-08  
a 2.759301551420879 3.1169e-08 au
q 2.454999027890397 2.5643e-07 au
i 3.951334497084262 9.5754e-06 deg
node 183.0095290238811 9.6731e-05 deg
peri 164.1172489158928 0.00010273 deg
M 282.0061004553532 3.424e-05 deg
tp 2459363.206474943001
(2021-May-28.70647494)
0.00016126 TDB
period 1674.160822087557
4.58
2.8367e-05
7.766e-08
d
yr
n .2150331050938739 3.6435e-09 deg/d
Q 3.063604074951362 3.4607e-08 au
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      7499 days (20.53 yr)  
   first obs. used      1998-09-21  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64436  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:29:04  

Additional Information
 Earth MOID = 1.44848 au 
 Jupiter MOID = 2.33653 au 
 T_jup = 3.330 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456739.5 (2014-Mar-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1092457752145967 8.8404e-08  
q 2.45788902020429 2.5691e-07 au
tp 2456020.389263599805
(2012-Apr-02.88926360)
0.00015336 TDB
node 183.0496996018823 9.6761e-05 deg
peri 164.9755788947975 0.00010284 deg
i 3.950258590645001 9.5741e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      7499 days (20.53 yr)  
   first obs. used      1998-09-21  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64436  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:29:04  

Additional Information
 Jupiter MOID = 2.33653 au 
 T_jup = 3.330 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.815279351867733E-15 -2.260004415208656E-14 3.286908065998175E-12 -5.172578172490329E-14 7.39485312575565E-13 -1.140864938262203E-14
q -2.260004415208656E-14 6.600234543716209E-14 -9.220521375451595E-12 1.499958541927273E-13 -2.018655988109884E-12 3.411741525023916E-14
tp 3.286908065998175E-12 -9.220521375451595E-12 2.351946515583228E-8 1.963743455636304E-11 5.369520021853847E-9 -7.829210878729851E-12
node -5.172578172490329E-14 1.499958541927273E-13 1.963743455636304E-11 9.362634245395116E-9 -9.334264409177429E-9 7.251914786288238E-11
peri 7.39485312575565E-13 -2.018655988109884E-12 5.369520021853847E-9 -9.334264409177429E-9 1.057634659086343E-8 -7.381875935097061E-11
i -1.140864938262203E-14 3.411741525023916E-14 -7.829210878729851E-12 7.251914786288238E-11 -7.381875935097061E-11 9.166366742536398E-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 17.1   n/a MPO471576  

344082 (1998 SF21)          Discovered 1998-Sep-21 by Spacewatch at Kitt Peak
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

Alternate Designations
 1998 SF21 = 2007 RU234 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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