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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .125129470875672 3.1133e-08  
a 3.124016981906425 1.3888e-08 au
q 2.73311038995386 9.6955e-08 au
i .9053592593349533 3.5919e-06 deg
node 40.47811647323383 0.00021859 deg
peri 189.5530060631995 0.00021907 deg
M 203.3925207207695 1.5948e-05 deg
tp 2459877.861361511850
(2022-Oct-25.36136151)
9.2033e-05 TDB
period 2016.826345701577
5.52
1.3449e-05
3.682e-08
d
yr
n .1784982632576479 1.1903e-09 deg/d
Q 3.51492357385899 1.5626e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3178  
   data-arc span      25553 days (69.96 yr)  
   first obs. used      1950-02-19  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44226  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:08:25  

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

[ 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
1954-Jul-10 02:22 00:01 Jupiter 1.86411035870229 1.86410943168494 1.86411128571933 2.61013792805647 2.42982537758472 2434933.598616996 1.31034543176968 37.4609951160659 23.9312184491976 -74.8645281303845 1621812.4230417 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
1964-Sep-14 14:44 00:01 Jupiter 1.49971189535468 1.4997115370578 1.49971225365105 1.43354135012709 0.962008570589941 2438653.113911838 1.09194372417426 133.515160039112 98.2665148069418 19.6350722083571 2408521.93373569 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
1974-Nov-15 15:08 < 00:01 Jupiter 1.73462549460808 1.73462494373084 1.73462604548542 2.46731035772448 2.26075535317926 2442367.130683544 0.832724058044284 56.4567844028028 5.89955099442959 -82.9425437749235 3008698.21306196 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2037-May-16 20:02 < 00:01 Jupiter 1.78347983502152 1.78347947090011 1.78348019914282 2.30040108356531 2.0837445579484 2465195.334642982 0.562776069010018 37.6959103097778 5.37450041471058 -88.0396463649121 3338211.40373735 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2047-Jul-20 18:12 < 00:01 Jupiter 1.49634121025239 1.49634088515711 1.49634153534749 1.44400414290107 0.976229040321378 2468912.258206090 0.827481257591256 139.571650635813 96.0339597141922 31.3298860157654 2476320.90002451 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2057-Sep-20 22:35 00:01 Jupiter 1.81729821573631 1.81729755026712 1.81729888120571 2.83276006533231 2.66314697291308 2472627.440983436 1.06245826716268 56.872438921121 12.3412998687009 -73.8207100116262 2984480.99804039 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2120-Mar-20 01:33 00:02 Jupiter 1.70274806878997 1.70274688921322 1.70274924836537 2.00834610940597 1.74314809082061 2495452.564909716 2.44005395794599 40.6594492300402 10.950159678788 -88.1526381012144 1109519.23283886 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2130-May-25 15:41 00:03 Jupiter 1.50962028501496 1.50961971762063 1.50962085241136 1.51615532404196 1.08469380567151 2499171.153148057 2.72991840237591 212.00784652516 75.3391791641952 47.6486642946695 2284198.1603507 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08
2140-Jul-30 05:28 00:03 Jupiter 1.89186014404709 1.89185846932545 1.89186181877002 3.19332724142102 3.04990164464569 2502889.727624466 2.86807809034016 122.105438176451 17.4938298095977 -61.2765655187323 2634072.88925684 T 40 CATAB v2.0f-lin.ifort 2020-Feb-22 16:08:44 2020-Feb-22 16:08

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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