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3368 Duncombe (1985 QT)
Classification: Outer Main-belt Asteroid          SPK-ID: 2003368
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09005983826221781 5.2921e-08  
a 3.383952339231334 2.4499e-08 au
q 3.079194138873106 1.8466e-07 au
i 19.15425431023647 5.426e-06 deg
node 4.090262288706162 1.1493e-05 deg
peri 351.112288352664 2.5414e-05 deg
M 273.0924084281969 2.5216e-05 deg
tp 2459945.395913229618
(2022-Dec-31.89591323)
0.00016195 TDB
period 2273.708489544357
6.23
2.4692e-05
6.76e-08
d
yr
n .1583316426250151 1.7194e-09 deg/d
Q 3.688710539589561 2.6705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2315  
   data-arc span      24402 days (66.81 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:24:36  

Additional Information
 Earth MOID = 2.07603 au 
 Jupiter MOID = 1.76756 au 
 T_jup = 3.055 
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Orbital Elements at Epoch 2457285.5 (2015-Sep-20.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08880312333748226 5.2896e-08  
q 3.086299447905684 1.8445e-07 au
tp 2457674.957116747566
(2016-Oct-13.45711675)
0.00015385 TDB
node 4.114657050364277 1.1495e-05 deg
peri 351.8716358214671 2.5667e-05 deg
i 19.14725106959945 5.4238e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2315  
   data-arc span      24402 days (66.81 yr)  
   first obs. used      1954-09-04  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:24:36  

Additional Information
 Jupiter MOID = 1.76756 au 
 T_jup = 3.055 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.798024733172586E-15 -9.686237812540228E-15 6.723801820725538E-13 -3.499481066089652E-15 5.585082700365146E-14 3.350853007828051E-15
q -9.686237812540228E-15 3.402083729250741E-14 -1.135213427139446E-12 9.014944363495107E-15 -2.806250870693141E-14 -1.161828806978614E-14
tp 6.723801820725538E-13 -1.135213427139446E-12 2.36685054843331E-8 -1.323132400778006E-11 3.54307813634218E-9 -1.218938011712092E-11
node -3.499481066089652E-15 9.014944363495107E-15 -1.323132400778006E-11 1.32133333435402E-10 -1.264352562674603E-10 -6.282312954792963E-12
peri 5.585082700365146E-14 -2.806250870693141E-14 3.54307813634218E-9 -1.264352562674603E-10 6.587762587244411E-10 4.064823984824315E-12
i 3.350853007828051E-15 -1.161828806978614E-14 -1.218938011712092E-11 -6.282312954792963E-12 4.064823984824315E-12 2.941775482804934E-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 11.11   n/a E2021B10  
diameter diameter 33.331 km 0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.087   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3368 Duncombe (1985 QT)          Discovered 1985-Aug-22 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1985 QT = 1954 RG = 1954 RN = 1970 GH1 = 1973 SP5 = 1976 GJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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