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4340 Dence (1986 JZ)
Classification: Main-belt Asteroid          SPK-ID: 2004340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2311128621262757 1.1905e-08  
a 2.393910117449705 9.3327e-09 au
q 1.840646698532855 2.777e-08 au
i 25.1519860845246 9.7544e-07 deg
node 81.01280743724703 2.2701e-06 deg
peri 175.7289477355422 5.1296e-06 deg
M 170.8930566513329 4.7757e-06 deg
tp 2458754.282546466754
(2019-Sep-27.78254647)
1.607e-05 TDB
period 1352.882836800528
3.70
7.9114e-06
2.166e-08
d
yr
n .2660984308525743 1.5561e-09 deg/d
Q 2.947173536366555 1.149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      15100 days (41.34 yr)  
   first obs. used      1979-11-16  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:25:45  

Additional Information
 Earth MOID = .826015 au 
 Jupiter MOID = 2.1339 au 
 T_jup = 3.368 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457445.5 (2016-Feb-27.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2307845628714637 1.1905e-08  
q 1.841619183477945 2.7803e-08 au
tp 2457401.247733184174
(2016-Jan-13.74773318)
1.4748e-05 TDB
node 81.02364403450999 2.2702e-06 deg
peri 175.7409699168092 5.1271e-06 deg
i 25.15058746831204 9.7498e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2413  
   data-arc span      15100 days (41.34 yr)  
   first obs. used      1979-11-16  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36359  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:25:45  

Additional Information
 Jupiter MOID = 2.1339 au 
 T_jup = 3.368 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.417286996693723E-16 -3.2021205824704E-16 1.187049730505766E-13 8.29079015053373E-16 3.700939872915376E-14 5.043037338590013E-15
q -3.2021205824704E-16 7.729949341258919E-16 -2.942756415284936E-13 -1.184802818025649E-15 -9.291929053829977E-14 -1.194310743231167E-14
tp 1.187049730505766E-13 -2.942756415284936E-13 2.175155010432075E-10 -4.437789011236919E-12 6.871093608972615E-11 2.767155627328196E-12
node 8.29079015053373E-16 -1.184802818025649E-15 -4.437789011236919E-12 5.153662915356884E-12 -5.877422202709068E-12 1.330790958849571E-12
peri 3.700939872915376E-14 -9.291929053829977E-14 6.871093608972615E-11 -5.877422202709068E-12 2.628712718214995E-11 -4.901332348617483E-13
i 5.043037338590013E-15 -1.194310743231167E-14 2.767155627328196E-12 1.330790958849571E-12 -4.901332348617483E-13 9.505930833690056E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.63   n/a MPCxxxxx  
diameter diameter 8.110 km 0.138 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.546 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]
[Clark, M. (2015) Minor Planet Bull. 42, 163-166.]
geometric albedo albedo 0.155   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4340 Dence (1986 JZ)          Discovered 1986-May-04 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1986 JZ = 1982 KF4 = 1986 LN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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