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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784554259731942 3.7138e-08  
a 3.137250848508613 1.3404e-08 au
q 2.577391411953244 1.1544e-07 au
i 2.427213235630421 3.7288e-06 deg
node 67.28517909638795 9.6644e-05 deg
peri 104.3852719859169 9.7151e-05 deg
M 235.2720815389967 1.1814e-05 deg
tp 2459703.707459279426
(2022-May-04.20745928)
6.9149e-05 TDB
period 2029.655336705897
5.56
1.3008e-05
3.561e-08
d
yr
n .1773700162236782 1.1367e-09 deg/d
Q 3.697110285063982 1.5796e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2987  
   data-arc span      31907 days (87.36 yr)  
   first obs. used      1933-03-23  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44876  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:31:05  

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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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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