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1939 Loretta (1974 UC)
Classification: Main-belt Asteroid          SPK-ID: 2001939
[ 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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1251294775352659 3.0732e-08  
a 3.124016984314956 1.3646e-08 au
q 2.733110371256328 9.6025e-08 au
i .9053588957219719 3.5261e-06 deg
node 40.47811921784109 0.00021359 deg
peri 189.5530037793792 0.00021407 deg
M 203.3925191746893 1.5872e-05 deg
tp 2459877.861371188079
(2022-Oct-25.36137119)		 9.1669e-05 TDB
period 2016.826348033953
5.52		 1.3214e-05
3.618e-08		 d
yr
n .178498263051222 1.1695e-09 deg/d
Q 3.514923597373583 1.5353e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3345  
   data-arc span      25832 days (70.72 yr)  
   first obs. used      1950-02-19  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:03:35  

Additional Information
 Earth MOID = 1.72276 au 
 Jupiter MOID = 1.47467 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456558.5 (2013-Sep-23.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1274052185334647 3.0406e-08  
q 2.723141930936358 9.5024e-08 au
tp 2455852.035273095209
(2011-Oct-17.53527310)		 8.1228e-05 TDB
node 40.4108061833979 0.00021336 deg
peri 190.5160059708882 0.00021383 deg
i .9073565015417224 3.525e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3345  
   data-arc span      25832 days (70.72 yr)  
   first obs. used      1950-02-19  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43376  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:03:35  

Additional Information
 Jupiter MOID = 1.47467 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.245421042621867E-16 -2.86691778096235E-15 -2.423449547113436E-13 7.337661479351532E-16 -3.392556653853627E-14 -2.733420205285211E-18
q -2.86691778096235E-15 9.029572494383826E-15 9.575042385809689E-13 -3.663806622868573E-15 1.483087771296525E-13 3.069854942029825E-17
tp -2.423449547113436E-13 9.575042385809689E-13 6.597997807787096E-9 -1.743620460634779E-12 1.163536091222114E-9 1.098683188580394E-13
node 7.337661479351532E-16 -3.663806622868573E-15 -1.743620460634779E-12 4.552302027134993E-8 -4.551745687061425E-8 -6.637393173334698E-11
peri -3.392556653853627E-14 1.483087771296525E-13 1.163536091222114E-9 -4.551745687061425E-8 4.572295846433474E-8 6.638644902881325E-11
i -2.733420205285211E-18 3.069854942029825E-17 1.098683188580394E-13 -6.637393173334698E-11 6.638644902881325E-11 1.242570498452493E-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 11.1   n/a MPO358646  
diameter diameter 30.365 km 0.351 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 23.88 h n/a LCDB (Rev. 2020-October); 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:
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
[Fauerbach, M. (2019) Minor Planet Bull. 46, 15-19.]
geometric albedo albedo 0.092   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1939 Loretta (1974 UC)          Discovered 1974-Oct-17 by Kowal, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1974 UC = 1934 JE = 1934 LQ = 1939 EH = 1939 GP = 1950 DT = 1950 ES = 1951 MF = 1955 CA = 1969 TE5 = 1975 TZ5 = 1975 XW 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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