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46927 (1998 SP54)
Classification: Main-belt Asteroid          SPK-ID: 2046927
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2234888973442054 3.4172e-08  
a 2.543944308821595 8.0084e-09 au
q 1.97540100033799 8.6452e-08 au
i 4.224970316615262 4.6061e-06 deg
node 188.6584646247263 5.3455e-05 deg
peri 261.3977481057497 5.49e-05 deg
M 155.1339762466165 1.2027e-05 deg
tp 2458757.848039575540
(2019-Oct-01.34803958)
4.9222e-05 TDB
period 1482.039662203399
4.06
6.9982e-06
1.916e-08
d
yr
n .242908478889678 1.147e-09 deg/d
Q 3.1124876173052 9.7982e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1248  
   data-arc span      10673 days (29.22 yr)  
   first obs. used      1992-04-07  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53595  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:26:42  

Additional Information
 Earth MOID = .997163 au 
 Jupiter MOID = 2.1221 au 
 T_jup = 3.405 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457244.5 (2015-Aug-10.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2222805184587504 3.4567e-08  
q 1.97926269159213 8.7604e-08 au
tp 2457276.278016263476
(2015-Sep-10.77801626)
4.9757e-05 TDB
node 188.6732351085144 5.3469e-05 deg
peri 261.7362852287052 5.492e-05 deg
i 4.222238152069703 4.6081e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1248  
   data-arc span      10673 days (29.22 yr)  
   first obs. used      1992-04-07  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53595  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 21:26:42  

Additional Information
 Jupiter MOID = 2.1221 au 
 T_jup = 3.405 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.194905671499978E-15 -3.020461222698052E-15 1.127829203371646E-12 -4.857258246753083E-15 2.716830778811294E-13 -2.720416846787615E-15
q -3.020461222698052E-15 7.674511173191154E-15 -2.905998835592101E-12 1.285566359596136E-14 -7.030778647991381E-13 6.886777043660495E-15
tp 1.127829203371646E-12 -2.905998835592101E-12 2.475739875924963E-9 -2.505252716078011E-12 6.417725205717348E-10 -5.167614526733159E-12
node -4.857258246753083E-15 1.285566359596136E-14 -2.505252716078011E-12 2.858982942402811E-9 -2.851664867757052E-9 -1.52017586611566E-10
peri 2.716830778811294E-13 -7.030778647991381E-13 6.417725205717348E-10 -2.851664867757052E-9 3.016193696177124E-9 1.503117188896638E-10
i -2.720416846787615E-15 6.886777043660495E-15 -5.167614526733159E-12 -1.52017586611566E-10 1.503117188896638E-10 2.123469824006122E-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 15.42   n/a MPCxxxxx  

46927 (1998 SP54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SP54 = 1996 HU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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