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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1255591550591544 3.1144e-08  
a 3.122742713670217 1.3893e-08 au
q 2.730653777074654 9.6949e-08 au
i .9056583214932468 3.5958e-06 deg
node 40.47830874449963 0.00022189 deg
peri 189.4699995351788 0.00022236 deg
M 132.0666817373208 1.5754e-05 deg
tp 2457861.076076598280
(2017-Apr-17.57607660)
8.6353e-05 TDB
period 2015.592494055945
5.52
1.3451e-05
3.683e-08
d
yr
n .1786075315628794 1.1919e-09 deg/d
Q 3.51483165026578 1.5637e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3066  
   data-arc span      25484 days (69.77 yr)  
   first obs. used      1950-02-19  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44984  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:28:44  

Additional Information
 Earth MOID = 1.72034 au 
 Jupiter MOID = 1.4752 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-January); 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 1.86411020459803 1.86410927782616 1.86411113136958 2.61013726080576 2.42982464535929 2434933.598539423 1.31371132045125 37.7398389539994 23.9567580052903 -75.1993448460895 1622516.13814774 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
1964-Sep-14 14:44 00:01 Jupiter 1.49971175616486 1.49971139766845 1.49971211466077 1.43354070393712 0.96200755317789 2438653.113846299 1.0944032119501 133.520245776525 98.3488824985609 19.6748151050557 2408420.95413835 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
1974-Nov-15 15:08 < 00:01 Jupiter 1.73462553527759 1.73462498475668 1.73462608579859 2.46731021274165 2.26075520001407 2442367.130631838 0.834274664476476 56.5579718747377 5.95585003207492 -83.0024307428886 3002834.01326946 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2037-May-16 20:02 < 00:01 Jupiter 1.78347978495465 1.7834794139414 1.7834801559678 2.30040088062663 2.08374432751095 2465195.334720631 0.566752195505984 38.0862518793421 5.43631811167001 -88.1032912783177 3281325.62254049 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2047-Jul-20 18:12 < 00:01 Jupiter 1.49634109059753 1.496340765159 1.4963414160359 1.44400347156911 0.976228000942756 2468912.258305158 0.83249279935019 139.715606709948 96.0635992440239 31.3879367352447 2475531.41957106 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2057-Sep-20 22:35 00:01 Jupiter 1.81729816007384 1.8172974859602 1.81729883418759 2.83275954227412 2.66314641118128 2472627.441080217 1.06815567784582 57.269297112657 12.4907655760898 -73.719095961042 2955092.74708913 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2120-Mar-20 01:34 00:02 Jupiter 1.70274810620936 1.70274691716633 1.70274929525104 2.00834614623838 1.74314813952789 2495452.565127558 2.45103380079349 41.1977431723456 11.0304364572539 -88.239427771512 1100078.91179936 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2130-May-25 15:41 00:03 Jupiter 1.50962013605672 1.50961956544689 1.5096207066686 1.5161544757421 1.08469256890006 2499171.153391157 2.74189169330139 213.099079603689 75.3507396695904 47.6271457506822 2281966.70437989 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29
2140-Jul-30 05:28 00:03 Jupiter 1.89185998572028 1.89185829898809 1.89186167245375 3.19332631180624 3.04990065902926 2502889.727861336 2.88011137658604 122.725066784636 17.6512954244728 -61.2194435572009 2612676.93550626 T 38 CATAB v2.0f-lin.ifort 2019-Dec-03 20:29:00 2019-Dec-03 20:29

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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