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187099 (2005 QD21)
Classification: Main-belt Asteroid          SPK-ID: 2187099
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2078441607519511 4.2583e-08  
a 2.355406940508427 1.1459e-08 au
q 1.865849361729133 1.0338e-07 au
i 8.389230300846897 4.4201e-06 deg
node 146.1089580695084 4.2086e-05 deg
peri 173.0898405099149 4.5227e-05 deg
M 151.4556578816749 1.7986e-05 deg
tp 2458841.004745085181
(2019-Dec-23.50474509)
6.3907e-05 TDB
period 1320.375181530481
3.61
9.6354e-06
2.638e-08
d
yr
n .2726497779083629 1.9897e-09 deg/d
Q 2.844964519287722 1.3841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      208  
   data-arc span      7151 days (19.58 yr)  
   first obs. used      2001-06-17  
   last obs. used      2021-01-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62708  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:54:00  

Additional Information
 Earth MOID = .852599 au 
 Jupiter MOID = 2.47788 au 
 T_jup = 3.511 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457632.5 (2016-Sep-01.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2081529582550048 4.2464e-08  
q 1.864832729796833 1.0311e-07 au
tp 2457521.827046112559
(2016-May-13.32704611)
5.9932e-05 TDB
node 146.1537659316299 4.2107e-05 deg
peri 173.2004396260543 4.5254e-05 deg
i 8.38769739584648 4.4191e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      208  
   data-arc span      7151 days (19.58 yr)  
   first obs. used      2001-06-17  
   last obs. used      2021-01-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62708  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:54:00  

Additional Information
 Jupiter MOID = 2.47788 au 
 T_jup = 3.511 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.803191760598941E-15 -4.362985129756722E-15 -5.186795534586412E-13 2.209178110122583E-14 -9.363013134211495E-14 -4.158915751929154E-15
q -4.362985129756722E-15 1.063131911479247E-14 1.409739824639803E-12 -5.189539142153714E-14 2.703366389240383E-13 1.113089561198543E-14
tp -5.186795534586412E-13 1.409739824639803E-12 3.591857550010378E-9 -1.463530065413978E-11 1.034832178539704E-9 1.607864299813268E-11
node 2.209178110122583E-14 -5.189539142153714E-14 -1.463530065413978E-11 1.773011376425266E-9 -1.757077270441227E-9 -1.02001114109806E-11
peri -9.363013134211495E-14 2.703366389240383E-13 1.034832178539704E-9 -1.757077270441227E-9 2.047901346871728E-9 1.448960306642877E-11
i -4.158915751929154E-15 1.113089561198543E-14 1.607864299813268E-11 -1.02001114109806E-11 1.448960306642877E-11 1.952858127635842E-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 17.41   n/a MPCxxxxx  

187099 (2005 QD21)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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