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JPL Small-Body Database Browser
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109220 (2001 QE87)
Classification: Outer Main-belt Asteroid          SPK-ID: 2109220
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1446361607309178 5.2091e-08  
a 3.22716100054402 2.3218e-08 au
q 2.760396823364785 1.6902e-07 au
i 11.29010601206738 5.9231e-06 deg
node 221.3687158500377 2.2133e-05 deg
peri 162.9109119847171 2.7308e-05 deg
M 345.837188858613 1.481e-05 deg
tp 2458683.806010912829
(2019-Jul-19.30601091)
8.7218e-05 TDB
period 2117.529043438287
5.80
2.2852e-05
6.257e-08
d
yr
n .1700094745408821 1.8347e-09 deg/d
Q 3.693925177723254 2.6576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      8807 days (24.11 yr)  
   first obs. used      1995-10-18  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49245  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 10:14:08  

Additional Information
 Earth MOID = 1.76645 au 
 Jupiter MOID = 1.76165 au 
 T_jup = 3.141 
[ 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 14.4   n/a MPO325220  
diameter diameter 8.630 km 0.321 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 77.375 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.054   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109220 (2001 QE87)          Discovered 2001-Aug-17 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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