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18678 (1998 FS85)
Classification: Main-belt Asteroid          SPK-ID: 2018678
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06066605186095856 3.6325e-08  
a 2.749747023447302 1.1272e-08 au
q 2.582930727918331 1.0024e-07 au
i 4.947739853796735 3.3685e-06 deg
node 104.0692068065809 4.4447e-05 deg
peri 123.4738757606666 5.3756e-05 deg
M 303.4162833029386 3.0423e-05 deg
tp 2459462.273999060812
(2021-Sep-04.77399906)
0.00014077 TDB
period 1665.472774904987
4.56
1.0241e-05
2.804e-08
d
yr
n .2161548392891247 1.3291e-09 deg/d
Q 2.916563318976272 1.1956e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2033  
   data-arc span      9810 days (26.86 yr)  
   first obs. used      1994-05-15  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50192  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:46:06  

Additional Information
 Earth MOID = 1.57519 au 
 Jupiter MOID = 2.06903 au 
 T_jup = 3.338 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456916.5 (2014-Sep-16.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06244627951141483 3.6049e-08  
q 2.576853181479119 9.9617e-08 au
tp 2456134.907442519308
(2012-Jul-26.40744252)
0.00013896 TDB
node 104.1469828887539 4.442e-05 deg
peri 124.0771970436663 5.3385e-05 deg
i 4.949789901211922 3.3705e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2033  
   data-arc span      9810 days (26.86 yr)  
   first obs. used      1994-05-15  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50192  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:46:06  

Additional Information
 Jupiter MOID = 2.06903 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.299553090208028E-15 -3.571137717252249E-15 -1.253319409768859E-12 4.454808046483026E-15 -2.321100429206567E-13 -3.700892244682733E-16
q -3.571137717252249E-15 9.923586302601318E-15 3.249794157113366E-12 -1.277312716333158E-14 6.068182064117486E-13 1.097481187930025E-15
tp -1.253319409768859E-12 3.249794157113366E-12 1.93104224282736E-8 -1.285664295839553E-11 4.129296383807472E-9 1.990760913673218E-12
node 4.454808046483026E-15 -1.277312716333158E-14 -1.285664295839553E-11 1.973142143226561E-9 -1.968283012838196E-9 9.099447750440907E-12
peri -2.321100429206567E-13 6.068182064117486E-13 4.129296383807472E-9 -1.968283012838196E-9 2.849937704246593E-9 -8.630128150621812E-12
i -3.700892244682733E-16 1.097481187930025E-15 1.990760913673218E-12 9.099447750440907E-12 -8.630128150621812E-12 1.136032399942719E-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 13.69   n/a MPCxxxxx  
rotation period rot_per 9.62537 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18678 (1998 FS85)          Discovered 1998-Mar-24 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 FS85 = 2000 SC74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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