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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1251294787821887 3.1255e-08  
a 3.124016984254482 1.389e-08 au
q 2.733110367308014 9.729e-08 au
i .9053589541220893 3.6047e-06 deg
node 40.4781159370014 0.00021761 deg
peri 189.5530058594905 0.00021809 deg
M 203.3925204063853 1.5932e-05 deg
tp 2459877.861364262280
(2022-Oct-25.36136426)
9.1962e-05 TDB
period 2016.826347975392
5.52
1.3451e-05
3.683e-08
d
yr
n .178498263056405 1.1905e-09 deg/d
Q 3.514923601200951 1.5628e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3224  
   data-arc span      25728 days (70.44 yr)  
   first obs. used      1950-02-19  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44004  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:43:27  

Additional Information
 Earth MOID = 1.72276 au 
 Jupiter MOID = 1.47467 au 
 T_jup = 3.203 
[ 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 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. 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:
[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

[ show close-approach data ]
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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