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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1025513534059213 2.3434e-08  
a 2.632698490525165 1.2422e-08 au
q 2.362711697212084 6.1503e-08 au
i 18.15344959979983 5.2249e-07 deg
node 299.4553141261949 3.1047e-06 deg
peri 291.5557458333785 8.0313e-06 deg
M 205.3029557399433 1.1064e-05 deg
tp 2459870.970429781708
(2022-Oct-18.47042978)
5.0731e-05 TDB
period 1560.271276519387
4.27
1.1043e-05
3.023e-08
d
yr
n .2307291080837421 1.633e-09 deg/d
Q 2.902685283838247 1.3696e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2502  
   data-arc span      26337 days (72.11 yr)  
   first obs. used      1949-02-03  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .34233  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:55:38  

Additional Information
 Earth MOID = 1.40742 au 
 Jupiter MOID = 2.37442 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 12.09   n/a E2021B10  
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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