Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 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

[ 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 1.86411030307056 1.86410938615802 1.86411121998277 2.61013774988764 2.4298251806135 2434933.598573142 1.28755295593899 36.2378632903733 23.5994295210506 -73.7898147708351 1639744.42423462 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
1964-Sep-14 14:44 00:01 Jupiter 1.49971186556067 1.49971151589694 1.49971221522398 1.43354123700974 0.962008390364092 2438653.113870558 1.07295795103197 131.426509126201 97.9365219879483 20.3654457534838 2454043.68668545 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
1974-Nov-15 15:08 < 00:01 Jupiter 1.73462551382116 1.73462496429288 1.73462606334963 2.46731038834743 2.26075538899246 2442367.130655080 0.818350656307699 55.9493845862002 5.85079712537999 -82.9272059432644 3030130.95618466 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2037-May-16 20:02 < 00:01 Jupiter 1.78347984333544 1.7834794886138 1.78348019805698 2.30040108894494 2.08374456494986 2465195.334674387 0.54432235813866 36.2925540046823 5.1502791665166 -88.0389848421063 3393433.10211926 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2047-Jul-20 18:12 < 00:01 Jupiter 1.49634118633498 1.49634086931223 1.49634150335756 1.44400402298713 0.976228853680625 2468912.258249095 0.804319684102415 136.1440295652 95.5688567700211 31.8849633487387 2526343.50184038 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2057-Sep-20 22:35 00:01 Jupiter 1.81729817401744 1.81729753478073 1.81729881325425 2.83275986621444 2.66314675709587 2472627.441033314 1.03606999551567 55.8496945710478 12.0884866058508 -74.3028284341767 3071988.17202612 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2120-Mar-20 01:34 00:02 Jupiter 1.70274813261469 1.70274698270936 1.70274928251876 2.0083462884546 1.7431483078059 2495452.565022670 2.38011415463026 39.1976845798131 10.9354916515795 -88.0930791330355 1135129.76686846 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2130-May-25 15:41 00:03 Jupiter 1.50962023805321 1.50961969355508 1.50962078255332 1.51615509916904 1.08469347525876 2499171.153272818 2.66458083879763 204.518308819292 74.7257856413895 48.1968919209969 2327127.89402088 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03
2140-Jul-30 05:28 00:03 Jupiter 1.89186003887196 1.89185841227103 1.89186166547418 3.19332675634957 3.04990112860211 2502889.727752366 2.80216708558176 119.380960167606 17.3376090536843 -61.5039512557105 2673636.5741417 T 44 CATAB v2.0f-lin.ifort 2020-Dec-18 02:03:44 2020-Dec-18 02:03

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-20 08:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin