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4417 Lecar (1931 GC)
Classification: Main-belt Asteroid          SPK-ID: 2004417
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1066166300274083 3.7507e-08  
a 2.757185963580981 1.2658e-08 au
q 2.463224087785104 1.0112e-07 au
i 9.007257408665462 5.1856e-06 deg
node 356.2115709419612 2.3896e-05 deg
peri 224.8741384166238 3.4421e-05 deg
M 134.4838760062241 2.4513e-05 deg
tp 2458375.809024512798
(2018-Sep-14.30902451)
0.00011448 TDB
period 1672.235794014329
4.58
1.1516e-05
3.153e-08
d
yr
n .2152806448041592 1.4825e-09 deg/d
Q 3.051147839376857 1.4008e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2190  
   data-arc span      32427 days (88.78 yr)  
   first obs. used      1931-03-18  
   last obs. used      2019-12-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47719  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:12:52  

Additional Information
 Earth MOID = 1.46575 au 
 Jupiter MOID = 1.95766 au 
 T_jup = 3.317 
[ 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 12.0   n/a MPO448958  
diameter diameter 11.100 km 0.244 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.1758 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.360   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4417 Lecar (1931 GC)          Discovered 1931-Apr-08 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 GC = 1983 RW4 = 1986 EK5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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