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154345 (2002 WS18)
Classification: Main-belt Asteroid          SPK-ID: 2154345
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1925783569190464 4.5263e-08  
a 2.274837623907886 1.0445e-08 au
q 1.836753132038078 9.9773e-08 au
i 2.979532122061653 5.2145e-06 deg
node 147.8275871922679 0.00013322 deg
peri 176.0069225425669 0.00013451 deg
M 117.9029958135547 2.1215e-05 deg
tp 2458590.063127038099
(2019-Apr-16.56312704)
7.2353e-05 TDB
period 1253.210516380259
3.43
8.6315e-06
2.363e-08
d
yr
n .2872621920216683 1.9785e-09 deg/d
Q 2.712922115777695 1.2457e-08 au
  Orbit Determination Parameters
   # obs. used (total)      382  
   data-arc span      6830 days (18.70 yr)  
   first obs. used      2001-05-15  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:31:58  

Additional Information
 Earth MOID = .824564 au 
 Jupiter MOID = 2.61057 au 
 T_jup = 3.583 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456819.5 (2014-Jun-11.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1930557718034998 4.5358e-08  
q 1.835203833117144 1.0002e-07 au
tp 2457337.767058298276
(2015-Nov-11.26705830)
6.8112e-05 TDB
node 147.8691071434822 0.00013322 deg
peri 176.1102662134459 0.0001345 deg
i 2.979806859306712 5.2172e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      382  
   data-arc span      6830 days (18.70 yr)  
   first obs. used      2001-05-15  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:31:58  

Additional Information
 Jupiter MOID = 2.61057 au 
 T_jup = 3.583 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.057351237670219E-15 -4.523377684367997E-15 1.289069726409249E-12 3.545518623940482E-14 3.01354159364144E-13 -1.897560630304433E-15
q -4.523377684367997E-15 1.000325247184226E-14 -2.706071792107729E-12 -7.265172033995889E-14 -6.343321774159087E-13 4.099816909750525E-15
tp 1.289069726409249E-12 -2.706071792107729E-12 4.639311792332968E-9 1.18337920839602E-10 1.32292984470533E-9 -2.387852978930556E-12
node 3.545518623940482E-14 -7.265172033995889E-14 1.18337920839602E-10 1.774730132169398E-8 -1.768579943039728E-8 3.072545517099318E-10
peri 3.01354159364144E-13 -6.343321774159087E-13 1.32292984470533E-9 -1.768579943039728E-8 1.809014025252104E-8 -3.074703126990964E-10
i -1.897560630304433E-15 4.099816909750525E-15 -2.387852978930556E-12 3.072545517099318E-10 -3.074703126990964E-10 2.721881637881882E-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 16.8   n/a MPO502912  

154345 (2002 WS18)          Discovered 2002-Nov-29 by Ball, L. at Emerald Lane
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Alternate Designations
 2002 WS18 = 2005 NX72 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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