Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1027892163428825 4.2654e-08  
a 2.632121548563363 1.394e-08 au
q 2.361567837267321 1.0853e-07 au
i 18.15355078955505 4.8634e-06 deg
node 299.45493270 1.574e-05 deg
peri 291.5621803670523 3.3522e-05 deg
M 159.1428483191077 3.1498e-05 deg
tp 2458310.987785718992
(2018-Jul-11.48778572)
0.00013628 TDB
period 1559.758416811995
4.27
1.2391e-05
3.392e-08
d
yr
n .2308049734623695 1.8336e-09 deg/d
Q 2.902675259859406 1.5373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2002  
   data-arc span      25924 days (70.98 yr)  
   first obs. used      1949-02-03  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:24:50  

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)  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1989-May-09 08:36 < 00:01 Eunom 0.0495784494347896 0.049576520216461 0.0495803786990612 5.90143633648567 5.90143628850755 2447655.858605584 0.386036009180642 129.831778086878 48.6688434576039 46.4438207086742 117187.363278649 T 29 CATAB v2.0f-lin.ifort 2020-Feb-22 16:25:06 2020-Feb-22 16:25
2120-Jan-25 16:47 00:01 Eunom 0.0165917805474779 0.0165879862612988 0.0165955854106109 5.71198348098768 5.7119833328676 2495398.199121498 1.02756770440323 710.349574666248 50.0850443013249 75.0627784494765 47864.8009620513 T 29 CATAB v2.0f-lin.ifort 2020-Feb-22 16:25:06 2020-Feb-22 16:25

Alternate Designations
 1975 DA = 1949 CE = 1966 BM = 1976 OQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-06 21:29 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin