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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .190504434927571 5.4185e-08  
a 2.682969951961558 1.1563e-08 au
q 2.171852277335469 1.4609e-07 au
i 11.81423321475391 4.7499e-06 deg
node 312.3166801791655 2.3443e-05 deg
peri 64.82821211274748 2.6137e-05 deg
M 134.6058347604925 1.0297e-05 deg
tp 2458400.317228080362
(2018-Oct-08.81722808)
4.6036e-05 TDB
period 1605.174086810729
4.39
1.0377e-05
2.841e-08
d
yr
n .224274739393079 1.4498e-09 deg/d
Q 3.194087626587648 1.3766e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1837  
   data-arc span      14215 days (38.92 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44786  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:15:17  

Additional Information
 Earth MOID = 1.2019 au 
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456737.5 (2014-Mar-21.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1880327284197314 5.3936e-08  
q 2.179017225039073 1.4507e-07 au
tp 2456790.492545099376
(2014-May-12.99254510)
4.9232e-05 TDB
node 312.4728174878505 2.3356e-05 deg
peri 64.06599628152446 2.6215e-05 deg
i 11.83517683096302 4.7548e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1837  
   data-arc span      14215 days (38.92 yr)  
   first obs. used      1981-02-04  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44786  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:15:17  

Additional Information
 Jupiter MOID = 2.40222 au 
 T_jup = 3.319 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.909131780294351E-15 -7.808655431406133E-15 -4.554460221002584E-13 1.765062850992907E-14 -2.122937069945932E-13 -8.327864886129349E-15
q -7.808655431406133E-15 2.104522874050618E-14 1.103084417515938E-12 -4.653868018407384E-14 5.403221445607226E-13 2.287865553923789E-14
tp -4.554460221002584E-13 1.103084417515938E-12 2.423834336545768E-9 -1.355955232774224E-11 6.056773272390914E-10 -6.819287557604483E-14
node 1.765062850992907E-14 -4.653868018407384E-14 -1.355955232774224E-11 5.455103263676405E-10 -5.371711980459207E-10 2.825923478254627E-11
peri -2.122937069945932E-13 5.403221445607226E-13 6.056773272390914E-10 -5.371711980459207E-10 6.872267254263208E-10 -2.748527839646723E-11
i -8.327864886129349E-15 2.287865553923789E-14 -6.819287557604483E-14 2.825923478254627E-11 -2.748527839646723E-11 2.260788615354557E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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 21 CATAB v2.0f-lin.ifort 2020-Jan-28 19:15:50 2020-Jan-28 19:15

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