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3805 Goldreich (1981 DK3)
Classification: Main-belt Asteroid          SPK-ID: 2003805
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1907276998676138 2.7706e-08  
a 2.682452792068807 1.0398e-08 au
q 2.170834741034065 7.5567e-08 au
i 11.8144538428579 1.1402e-06 deg
node 312.3176155633313 3.599e-06 deg
peri 64.8097340165927 4.897e-06 deg
M 179.4823848425253 5.7783e-06 deg
tp 2458400.452285152859
(2018-Oct-08.95228515)
2.3558e-05 TDB
period 1604.709997572586
4.39
9.3307e-06
2.555e-08
d
yr
n .2243396006409663 1.3044e-09 deg/d
Q 3.19407084310355 1.2381e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2322  
   data-arc span      14656 days (40.13 yr)  
   first obs. used      1981-02-04  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:12:56  

Additional Information
 Earth MOID = 1.19947 au 
 Jupiter MOID = 2.40309 au 
 T_jup = 3.320 
[ 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 12.80   n/a E2021B10  
diameter diameter 12.9 km n/a DASTCOM value unverified
rotation period rot_per 4.841 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.]
geometric albedo albedo 0.1165   0.025 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 2: from the PDS IMPS singleton file

3805 Goldreich (1981 DK3)          Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 DK3 = 1978 NK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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