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2548 Leloir (1975 DA)
Classification: Main-belt Asteroid          SPK-ID: 2002548
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1027892119307754 4.1087e-08  
a 2.632121547143794 1.3456e-08 au
q 2.36156784760687 1.0514e-07 au
i 18.15355050353343 4.5826e-06 deg
node 299.4549327143492 1.5244e-05 deg
peri 291.562184553715 3.1988e-05 deg
M 159.1428446086671 3.0537e-05 deg
tp 2458310.987802352885
(2018-Jul-11.48780235)
0.00013174 TDB
period 1559.75841555017
4.27
1.1961e-05
3.275e-08
d
yr
n .2308049736490879 1.7699e-09 deg/d
Q 2.902675246680718 1.4839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2230  
   data-arc span      26208 days (71.75 yr)  
   first obs. used      1949-02-03  
   last obs. used      2020-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .35472  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:07:02  

Additional Information
 Earth MOID = 1.40784 au 
 Jupiter MOID = 2.37531 au 
 T_jup = 3.321 
[ 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 MPO358653  
diameter diameter 10.364 km 0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.2066 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Benishek, V. (2020) Minor Planet Bull. 47, 75-83.]
[Ferrero, A.; Bonamico, R. (2020) Minor Planet Bull. 47, 64-65.]
geometric albedo albedo 0.412   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2548 Leloir (1975 DA)          Discovered 1975-Feb-16 by Felix Aguilar Observatory at El Leoncito
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1975 DA = 1949 CE = 1966 BM = 1976 OQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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