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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1905044309958254 5.2109e-08  
a 2.682969952749207 1.0735e-08 au
q 2.171852288521822 1.3953e-07 au
i 11.81423300996514 4.7304e-06 deg
node 312.3166833067664 2.0251e-05 deg
peri 64.82820816250515 2.2929e-05 deg
M 134.6058352221551 1.0037e-05 deg
tp 2458400.317225757597
(2018-Oct-08.81722576)
4.4526e-05 TDB
period 1605.174087517584
4.39
9.6338e-06
2.638e-08
d
yr
n .2242747392943174 1.346e-09 deg/d
Q 3.194087616976591 1.278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2185  
   data-arc span      14355 days (39.30 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:57:03  

Additional Information
 Earth MOID = 1.2019 au 
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457127.5 (2015-Apr-15.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1880712054507284 5.195e-08  
q 2.179655126065374 1.3872e-07 au
tp 2456790.863494837702
(2014-May-13.36349484)
4.6537e-05 TDB
node 312.4737567005817 2.0171e-05 deg
peri 64.19162478829682 2.2996e-05 deg
i 11.83473253211708 4.7355e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2185  
   data-arc span      14355 days (39.30 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42736  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:57:03  

Additional Information
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.698846241333105E-15 -7.192634695028363E-15 -6.876537387951497E-13 4.84938708530972E-15 -2.657998088323744E-13 -6.69827215104115E-15
q -7.192634695028363E-15 1.924381405384754E-14 1.771509268119745E-12 -1.223401990399998E-14 6.975160540337156E-13 1.825986986432645E-14
tp -6.876537387951497E-13 1.771509268119745E-12 2.165735607082944E-9 -5.410618672704654E-12 5.236163014385675E-10 9.358942831425069E-13
node 4.84938708530972E-15 -1.223401990399998E-14 -5.410618672704654E-12 4.068800836549214E-10 -3.992537816044162E-10 2.979271747735521E-11
peri -2.657998088323744E-13 6.975160540337156E-13 5.236163014385675E-10 -3.992537816044162E-10 5.287933460611472E-10 -2.870004207402907E-11
i -6.69827215104115E-15 1.825986986432645E-14 9.358942831425069E-13 2.979271747735521E-11 -2.870004207402907E-11 2.24245727840026E-11

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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