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JPL Small-Body Database Browser
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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 | 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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1905044295928957 5.312e-08  
a 2.682969953501945 1.117e-08 au
q 2.171852292895179 1.4275e-07 au
i 11.81423328243041 4.7478e-06 deg
node 312.3166813671489 2.1947e-05 deg
peri 64.82820944448883 2.4675e-05 deg
M 134.6058355182515 1.0182e-05 deg
tp 2458400.317224184775
4.5359e-05 TDB
period 1605.174088193109
n .2242747391999331 1.4006e-09 deg/d
Q 3.194087614108711 1.3298e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1926  
   data-arc span      14245 days (39.00 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:56:23  

Additional Information
 Earth MOID = 1.2019 au 
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
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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 12.7   n/a MPO358666  
diameter diameter 12.9 km n/a DASTCOM value unverified
rotation period rot_per 4.841 h n/a LCDB (Rev. 2019-August); 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2074-Jan-13 13:54 00:03 Eunom 0.0439318931520564 0.0439243655078823 0.0439394214186701 1.23016158784977 1.23016132810199 2478586.079073986 2.6888188433237 451.231386568415 45.3443318691815 -35.0587241038044 83201.9059757404 T 22 CATAB v2.0f-lin.ifort 2020-Feb-22 16:56:35 2020-Feb-22 16:56

Alternate Designations
 1981 DK3 = 1978 NK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-Feb-25 13:48 UT
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