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1261 Legia (1933 FB)
Classification: Main-belt Asteroid          SPK-ID: 2001261
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784554117073848 3.4565e-08  
a 3.137250844245127 1.2786e-08 au
q 2.577391453206022 1.0855e-07 au
i 2.427213133928991 3.7272e-06 deg
node 67.28515861643271 9.0519e-05 deg
peri 104.3852924382553 9.106e-05 deg
M 235.2720833921946 1.1679e-05 deg
tp 2459703.707447397747
(2022-May-04.20744740)
6.8207e-05 TDB
period 2029.655332568481
5.56
1.2408e-05
3.397e-08
d
yr
n .1773700165852438 1.0843e-09 deg/d
Q 3.697110235284231 1.5068e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3178  
   data-arc span      31993 days (87.59 yr)  
   first obs. used      1933-03-23  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43866  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:20:50  

Additional Information
 Earth MOID = 1.58442 au 
 Jupiter MOID = 1.27188 au 
 T_jup = 3.185 
[ 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 11.2   n/a MPO350808  
diameter diameter 32.576 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.693 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. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.067   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1261 Legia (1933 FB)          Discovered 1933-Mar-23 by Delporte, E. at Uccle
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
1964-Jun-15 20:32 00:01 Jupiter 1.57914173497674 1.57914066364745 1.57914280630442 1.63914893710511 1.27045114317526 2438562.355523763 1.28130113147393 155.288043686158 83.943474246088 38.5415716868315 1123104.37172529 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
1974-Nov-13 06:14 < 00:01 Jupiter 1.3042448459394 1.3042445055477 1.3042451863311 0.66624487694295 n/a 2442364.759951748 0.859186047862871 63.0816917026427 16.9106990341929 -88.6195587965385 11530451.5674505 F 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
1985-Apr-03 02:44 < 00:01 Jupiter 1.73144786035619 1.73144726024661 1.73144846046537 1.93401552707246 1.6619320419698 2446158.613611218 0.631380945917906 50.4863107001784 17.041817487958 79.5196886428002 1954301.62159651 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2059-May-25 05:11 < 00:01 Jupiter 1.54495850257135 1.54495786867799 1.54495913646436 1.50673074039579 1.08339226362007 2473238.715641730 0.995703325195736 167.282762079091 112.455859027378 29.8523016538594 1507552.77335106 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2069-Oct-26 16:34 00:01 Jupiter 1.30367334803932 1.30367288922 1.30367380685897 0.678585877492997 n/a 2477046.190186549 1.23060006857375 74.6846610360723 20.3443889799105 81.6239455886006 9488117.52813271 F 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2080-Mar-16 11:31 00:02 Jupiter 1.74952609629802 1.74952488000552 1.74952731258932 2.03581224825427 1.78220188625322 2480839.979562939 1.61403008587136 60.3798978504373 10.8159144993799 80.950575026496 1284159.37823289 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2154-May-04 02:59 00:03 Jupiter 1.52223025027642 1.52222821413013 1.52223228642264 1.41098861602878 0.937026384682679 2507915.624517114 3.27829920546237 741.482580364343 144.335471188163 25.2151826701229 1054892.50943922 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2164-Oct-04 13:19 00:03 Jupiter 1.31707973656026 1.31707876742767 1.31708070569963 0.721626170448054 n/a 2511722.054555241 3.35210723025435 173.934739584109 21.8600886715792 75.5357660642039 8728954.00221157 F 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21
2175-Feb-18 22:30 00:04 Jupiter 1.79054489944357 1.79054202037557 1.79054777850646 2.21877775357553 1.99420882917657 2515511.437780480 3.82138156626627 94.9639087161676 12.4669870863586 -80.0294975335811 928611.131807155 T 43 CATAB v2.0f-lin.ifort 2020-Nov-13 04:21:00 2020-Nov-13 04:21

Alternate Designations
 1933 FB = 1938 CS = 1938 DH = 1944 FD = 1966 DG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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