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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247354550588314 1.9702e-08  
a 3.124864013525562 1.2175e-08 au
q 2.735082678801485 6.6114e-08 au
i .9052828570594982 4.428e-07 deg
node 40.47313007810597 3.0816e-05 deg
peri 189.5192239476738 2.9519e-05 deg
M 274.0706108069374 8.5627e-06 deg
tp 2459878.097623097146
(2022-Oct-25.59762310)
4.9332e-05 TDB
period 2017.646650850043
5.52
1.1792e-05
3.228e-08
d
yr
n .1784256920548157 1.0428e-09 deg/d
Q 3.514645348249639 1.3694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3677  
   data-arc span      26032 days (71.27 yr)  
   first obs. used      1950-02-19  
   last obs. used      2021-05-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42116  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:58:02  

Additional Information
 Earth MOID = 1.72519 au 
 Jupiter MOID = 1.47255 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 11.19   n/a E2021B10  
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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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 02:21 00:01 Jupiter 1.86410987862559 1.86410916356778 1.86411059368319 2.61013603247451 2.42982329420817 2434933.598157404 1.15763086252439 21.9487808236244 2.12207129984136 -21.3722942022563 5357443.52397741 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
1964-Sep-14 14:44 < 00:01 Jupiter 1.49971177185442 1.49971156493999 1.49971197876868 1.43354121738585 0.962008327681403 2438653.113568396 0.957077853916942 82.6520504886921 18.4801168164162 15.387900732143 5429305.76268524 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
1974-Nov-15 15:08 < 00:01 Jupiter 1.73462568989595 1.73462529168351 1.73462608810848 2.46731106610054 2.26075615178634 2442367.130457053 0.724198218120969 38.0720909298683 1.6881831843241 -81.3775013476411 6640583.30775247 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2037-May-16 20:02 < 00:01 Jupiter 1.78347975761909 1.78347949721408 1.78348001802399 2.30040070669131 2.08374413325652 2465195.334683469 0.440477066764377 3.25467183342282 1.65807756253215 -42.5608076246282 4579119.37368976 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2047-Jul-20 18:12 < 00:01 Jupiter 1.4963411473221 1.49634095415694 1.49634134048718 1.44400401184534 0.976228825285469 2468912.258314730 0.685454122055745 79.112365317553 20.2730623121485 17.8365633787393 5747119.22758747 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2057-Sep-20 22:35 < 00:01 Jupiter 1.81729814511934 1.8172976207774 1.81729866946138 2.83275950554355 2.66314637163802 2472627.441153970 0.904794913486959 42.6949118381755 4.05606220926008 -68.2425127300481 7386898.18445012 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2120-Mar-20 01:35 00:02 Jupiter 1.7027485825216 1.70274751864374 1.70274964639831 2.0083477508906 1.74315006971117 2495452.565777227 2.06559109112433 9.31254267553543 2.97518585035051 -13.6070498512648 1206977.81837333 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2130-May-25 15:42 00:02 Jupiter 1.50962002800136 1.5096196530081 1.50962040299608 1.516154314851 1.08469230984295 2499171.154152987 2.32462912114178 145.59613207868 28.2679256855086 48.59366751777 5887436.81189854 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00
2140-Jul-30 05:29 00:02 Jupiter 1.89185929374291 1.89185784522081 1.89186074226608 3.19332327846417 3.04989743015728 2502889.728714661 2.45877789038334 103.898120032714 5.15788988159718 -59.6089963450131 7640054.2723556 T 51 CATAB v2.0g-lin.ifort 2021-Jul-08 13:00:12 2021-Jul-08 13:00

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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