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12554 (1998 QA47)
Classification: Main-belt Asteroid          SPK-ID: 2012554
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1471829888583688 3.6384e-08  
a 3.151967020037591 1.9387e-08 au
q 2.688051093245452 1.2019e-07 au
i 6.455743321603624 4.1568e-06 deg
node 120.4950956681604 3.8551e-05 deg
peri 169.174364276275 4.2065e-05 deg
M .6194528263714796 1.5555e-05 deg
tp 2458996.982965228968
(2020-May-27.48296523)
8.8323e-05 TDB
period 2043.953088386322
5.60
1.8857e-05
5.163e-08
d
yr
n .1761292869418133 1.625e-09 deg/d
Q 3.61588294682973 2.224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1824  
   data-arc span      11958 days (32.74 yr)  
   first obs. used      1987-09-21  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51798  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:28:53  

Additional Information
 Earth MOID = 1.67212 au 
 Jupiter MOID = 1.57536 au 
 T_jup = 3.181 
[ show covariance matrix ]

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 12.8   n/a MPO473936  
diameter diameter 12.713 km 1.751 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.100   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

12554 (1998 QA47)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QA47 = 1987 SC3 = 1992 OH8 = 1993 TG46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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