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4761 Urrutia (1981 QC)
Classification: Main-belt Asteroid          SPK-ID: 2004761
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2154709963922368 6.3651e-08  
a 2.339684077731538 9.0002e-09 au
q 1.835550018259672 1.4806e-07 au
i 25.56866947352719 6.3623e-06 deg
node 65.9825557387269 9.5155e-06 deg
peri 332.6275662308315 1.2607e-05 deg
M 321.6421736701204 8.475e-06 deg
tp 2459339.779033348527
(2021-May-05.27903335)		 3.1004e-05 TDB
period 1307.17657393458
3.58		 7.5426e-06
2.065e-08		 d
yr
n .2754027322539953 1.5891e-09 deg/d
Q 2.843818137203404 1.094e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      14322 days (39.21 yr)  
   first obs. used      1981-08-31  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4681  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:19:08  

Additional Information
 Earth MOID = .866663 au 
 Jupiter MOID = 2.58176 au 
 T_jup = 3.405 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2165136474221784 6.3731e-08  
q 1.832862634457737 1.4854e-07 au
tp 2456726.873084473116
(2014-Mar-10.37308447)		 3.0086e-05 TDB
node 66.02881561298634 9.5098e-06 deg
peri 332.7618660958651 1.2554e-05 deg
i 25.58515205284825 6.3658e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1458  
   data-arc span      14322 days (39.21 yr)  
   first obs. used      1981-08-31  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4681  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:19:08  

Additional Information
 Jupiter MOID = 2.58176 au 
 T_jup = 3.405 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.061665229450839E-15 -9.456558684031675E-15 3.646973497061913E-13 4.564818551108783E-15 1.597088828724006E-15 -9.723464703709541E-15
q -9.456558684031675E-15 2.206542698746067E-14 -8.981894685614782E-13 -1.080639353119157E-14 -1.200943416909915E-14 2.275632450803931E-14
tp 3.646973497061913E-13 -8.981894685614782E-13 9.051480676117561E-10 -9.232581610411062E-13 2.546130123640504E-10 -5.010115731018973E-12
node 4.564818551108783E-15 -1.080639353119157E-14 -9.232581610411062E-13 9.043722863117046E-11 -8.113013076018336E-11 -2.263191764338986E-11
peri 1.597088828724006E-15 -1.200943416909915E-14 2.546130123640504E-10 -8.113013076018336E-11 1.575998744856205E-10 1.910205828756704E-11
i -9.723464703709541E-15 2.275632450803931E-14 -5.010115731018973E-12 -2.263191764338986E-11 1.910205828756704E-11 4.052335062554667E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO435744  
diameter diameter 3.732 km 0.859 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.383   0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4761 Urrutia           Discovered 1981 Aug. 27 by H.-E. Schuster at the European Southern Observatory..
Named in honor of Antonio Urrutia A., Chilean lawyer in Santiago and for three decades legal advisor to the European Southern Observatory. The discoverer appreciates Urrutia's friendship and recalls his fruitful work.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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