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109187 (2001 QK71)
Classification: Main-belt Asteroid          SPK-ID: 2109187
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09231254045680037 4.9401e-08  
a 2.32444538502173 8.9795e-09 au
q 2.109869926377289 1.1727e-07 au
i 7.875847114961864 5.9964e-06 deg
node 41.02027794746847 2.9765e-05 deg
peri 10.99529518670954 4.1356e-05 deg
M 25.83257008539557 2.8661e-05 deg
tp 2458907.615646599949
(2020-Feb-28.11564660)
0.0001029 TDB
period 1294.426652612573
3.54
7.5007e-06
2.054e-08
d
yr
n .2781154106131878 1.6116e-09 deg/d
Q 2.539020843666172 9.8085e-09 au
  Orbit Determination Parameters
   # obs. used (total)      683  
   data-arc span      8041 days (22.02 yr)  
   first obs. used      1998-11-09  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:36:30  

Additional Information
 Earth MOID = 1.12077 au 
 Jupiter MOID = 2.76161 au 
 T_jup = 3.557 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457167.5 (2015-May-25.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09231795594299742 4.9712e-08  
q 2.109831492749743 1.1808e-07 au
tp 2457610.198434749972
(2016-Aug-09.69843475)
0.00010062 TDB
node 41.04287429490012 2.9748e-05 deg
peri 10.22540579032037 4.1281e-05 deg
i 7.879160405610897 5.9997e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      683  
   data-arc span      8041 days (22.02 yr)  
   first obs. used      1998-11-09  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:36:30  

Additional Information
 Jupiter MOID = 2.76161 au 
 T_jup = 3.557 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.471247268712016E-15 -5.856811226535095E-15 -2.529637409252021E-12 -1.303170044741115E-14 -6.642730218365111E-13 -2.038763877770829E-15
q -5.856811226535095E-15 1.394259687039653E-14 6.069746252136063E-12 3.068643581841237E-14 1.588983662292617E-12 5.121567924012771E-15
tp -2.529637409252021E-12 6.069746252136063E-12 1.012503001779266E-8 3.034804017424159E-11 2.888085007473149E-9 2.982343573297145E-12
node -1.303170044741115E-14 3.068643581841237E-14 3.034804017424159E-11 8.849390652822174E-10 -8.676433865070702E-10 -7.191607034142468E-11
peri -6.642730218365111E-13 1.588983662292617E-12 2.888085007473149E-9 -8.676433865070702E-10 1.70413339120761E-9 7.206670693421636E-11
i -2.038763877770829E-15 5.121567924012771E-15 2.982343573297145E-12 -7.191607034142468E-11 7.206670693421636E-11 3.599593060054017E-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 15.9   n/a MPO449652  
rotation period rot_per 19.737 h n/a LCDB (Rev. 2020-October); 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.]

109187 (2001 QK71)          Discovered 2001-Aug-16 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 QK71 = 1998 VH55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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