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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .190504429197267 5.2184e-08  
a 2.682969953359864 1.079e-08 au
q 2.171852293841625 1.3978e-07 au
i 11.81423313416602 4.7379e-06 deg
node 312.3166820485277 2.0443e-05 deg
peri 64.82820871241591 2.3142e-05 deg
M 134.6058355886454 1.0063e-05 deg
tp 2458400.317223918577
(2018-Oct-08.81722392)
4.467e-05 TDB
period 1605.174088065603
4.39
9.6835e-06
2.651e-08
d
yr
n .2242747392177483 1.353e-09 deg/d
Q 3.194087612878103 1.2846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2119  
   data-arc span      14328 days (39.23 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42939  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:59:20  

Additional Information
 Earth MOID = 1.2019 au 
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
[ show covariance matrix ]

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

[ show close-approach data ]
Alternate Designations
 1981 DK3 = 1978 NK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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