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12889 (1998 QW42)
Classification: Main-belt Asteroid          SPK-ID: 2012889
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1275924818594101 3.5263e-08  
a 3.108174043880405 1.7693e-08 au
q 2.711594403570705 1.095e-07 au
i 1.587488045325228 4.1011e-06 deg
node 205.0938390583706 0.00013655 deg
peri 7.415675988689054 0.00013741 deg
M 105.8853207014261 1.6447e-05 deg
tp 2458411.805909190014
(2018-Oct-20.30590919)
8.9706e-05 TDB
period 2001.503808910319
5.48
1.709e-05
4.679e-08
d
yr
n .1798647588864671 1.5358e-09 deg/d
Q 3.504753684190105 1.995e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1868  
   data-arc span      11147 days (30.52 yr)  
   first obs. used      1990-01-24  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:37:51  

Additional Information
 Earth MOID = 1.7056 au 
 Jupiter MOID = 1.46185 au 
 T_jup = 3.207 
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Orbital Elements at Epoch 2456327.5 (2013-Feb-04.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247161870960209 3.5452e-08  
q 2.722281714113171 1.0965e-07 au
tp 2456411.015883034450
(2013-Apr-28.51588303)
8.8024e-05 TDB
node 205.2111126342434 0.00013639 deg
peri 8.076677533819794 0.00013728 deg
i 1.586754127352225 4.1039e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1868  
   data-arc span      11147 days (30.52 yr)  
   first obs. used      1990-01-24  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:37:51  

Additional Information
 Jupiter MOID = 1.46185 au 
 T_jup = 3.207 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.256879344398888E-15 -3.849730538130229E-15 -7.895201968845662E-13 -2.891756211252075E-15 -1.476564228515333E-13 -5.191735944737066E-18
q -3.849730538130229E-15 1.202249117612619E-14 2.59797421901756E-12 1.629724058048209E-14 4.737742545392334E-13 2.181598876636487E-16
tp -7.895201968845662E-13 2.59797421901756E-12 7.748244057541945E-9 -5.279230970605745E-12 1.397012378543381E-9 -3.413445938944791E-13
node -2.891756211252075E-15 1.629724058048209E-14 -5.279230970605745E-12 1.860239979626928E-8 -1.859534525083462E-8 -1.30812172735523E-10
peri -1.476564228515333E-13 4.737742545392334E-13 1.397012378543381E-9 -1.859534525083462E-8 1.884612163831515E-8 1.307165751667557E-10
i -5.191735944737066E-18 2.181598876636487E-16 -3.413445938944791E-13 -1.30812172735523E-10 1.307165751667557E-10 1.684199933369352E-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 13.0   n/a MPO347627  
rotation period rot_per 5.363 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

12889 (1998 QW42)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QW42 = 1990 BX4 = 1993 TK15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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