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1565 Lemaitre (1948 WA)
Classification: Mars-crossing Asteroid          SPK-ID: 2001565
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3482277674846967 3.4446e-08  
a 2.392322166176917 7.1648e-09 au
q 1.559249159144976 8.3421e-08 au
i 21.49565911039046 4.0765e-06 deg
node 261.1476024735706 1.2221e-05 deg
peri 116.3963931981799 1.3645e-05 deg
M 142.4977594316242 7.3552e-06 deg
tp 2458465.525035912789
(2018-Dec-13.02503591)
2.6479e-05 TDB
period 1351.536949349779
3.70
6.0716e-06
1.662e-08
d
yr
n .2663634169773865 1.1966e-09 deg/d
Q 3.225395173208859 9.6598e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2619  
   data-arc span      26130 days (71.54 yr)  
   first obs. used      1948-11-25  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:33:04  

Additional Information
 Earth MOID = .67242 au 
 Jupiter MOID = 2.55593 au 
 T_jup = 3.358 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456984.5 (2014-Nov-23.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3477814463679424 3.4516e-08  
q 1.56096005578502 8.3633e-08 au
tp 2457111.566774526336
(2015-Mar-30.06677453)
2.4434e-05 TDB
node 261.3648857241963 1.2231e-05 deg
peri 115.9482226303493 1.3639e-05 deg
i 21.46369168960161 4.0779e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2619  
   data-arc span      26130 days (71.54 yr)  
   first obs. used      1948-11-25  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:33:04  

Additional Information
 Jupiter MOID = 2.55593 au 
 T_jup = 3.358 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.191352812587785E-15 -2.882301010680347E-15 -3.282382807199488E-13 6.086758607660375E-15 -7.944495258190545E-14 -4.431449219010678E-15
q -2.882301010680347E-15 6.99444719149077E-15 8.160797748156983E-13 -1.500720107077135E-14 1.960310486377566E-13 1.133223260509084E-14
tp -3.282382807199488E-13 8.160797748156983E-13 5.97028433288513E-10 -9.144257097815983E-12 1.682297730965643E-10 7.086364611820151E-12
node 6.086758607660375E-15 -1.500720107077135E-14 -9.144257097815983E-12 1.49601541234029E-10 -1.412927067779631E-10 9.84117108587058E-12
peri -7.944495258190545E-14 1.960310486377566E-13 1.682297730965643E-10 -1.412927067779631E-10 1.860090984958014E-10 -7.61570975667993E-12
i -4.431449219010678E-15 1.133223260509084E-14 7.086364611820151E-12 9.84117108587058E-12 -7.61570975667993E-12 1.662919877724486E-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 12.6   n/a MPO458843  
diameter diameter 7.949 km 1.558 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 11.403 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:
[Warner, B.D.; Vander Haagen, G. (2008) Minor Planet Bull. 35, 52.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
geometric albedo albedo 0.239   0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B Sq   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)

1565 Lemaitre (1948 WA)          Discovered 1948-Nov-25 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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