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3858 Dorchester (1986 TG)
Classification: Mars-crossing Asteroid          SPK-ID: 2003858
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .243083265563347 6.9963e-09  
a 2.189397038130597 5.3743e-09 au
q 1.657191256487092 1.5383e-08 au
i 7.708298165769969 2.6306e-07 deg
node 347.9134435298552 2.5524e-06 deg
peri 335.3240021908273 4.3227e-06 deg
M 227.0988919811108 3.0633e-06 deg
tp 2459637.328853942687
(2022-Feb-26.82885394)
1.1143e-05 TDB
period 1183.273712037196
3.24
4.3569e-06
1.193e-08
d
yr
n .3042406810341473 1.1202e-09 deg/d
Q 2.721602819774103 6.6807e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2407  
   data-arc span      17340 days (47.47 yr)  
   first obs. used      1973-10-01  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:15:45  

Additional Information
 Earth MOID = .647183 au 
 Jupiter MOID = 2.62658 au 
 T_jup = 3.624 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.77   n/a MPCxxxxx  
diameter diameter 3.315 km 0.422 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.339   0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
SMASSII spectral type spec_B Sa   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)

3858 Dorchester (1986 TG)          Discovered 1986-Oct-03 by Jensen, P. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1986 TG = 1934 PY = 1973 TB = 1985 DZ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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