Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
38 Leda
Classification: Main-belt Asteroid          SPK-ID: 2000038
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 81 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555854823225034 3.4362e-08  
a 2.740241992354065 7.8504e-09 AU
q 2.31390012029328 9.441e-08 AU
i 6.974021677648941 4.1232e-06 deg
node 295.7627429226217 3.5896e-05 deg
peri 169.7627338894081 3.82e-05 deg
M 16.59890539785785 1.3486e-05 deg
tp 2456924.106087688806
(2014-Sep-23.60608769)
6.1972e-05 JED
period 1656.844699866726
4.54
7.1199e-06
1.949e-08
d
yr
n .2172804729549836 9.3371e-10 deg/d
Q 3.16658386441485 9.0718e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1452  
   data-arc span      57721 days (158.03 yr)  
   first obs. used      1856-01-29  
   last obs. used      2014-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57913  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:53:15  

Additional Information
 Earth MOID = 1.33098 AU 
 T_jup = 3.322 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.32 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
diameter diameter 115.93 km 2.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
rotation period rot_per 12.838 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[De Young, J.A.; Schmidt, R.E. (1996) Minor Planet Bul. 23, 44.]
[Pilcher, F. (2009) Minor Planet Bul. 36, 25-27.]
[Pilcher, F. (2010) Minor Planet Bul. 37, 119-122.]
[Pilcher, F. (2011) Minor Planet Bul. 38, 183-185.]
[Pilcher, F. (2013) Minor Planet Bul. 40, 33.]
[Franco, L.; Pilcher, F.; Durech, J. (2013) Minor Planet Bul. 40, 229-231.]
geometric albedo albedo 0.0618   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 25
B-V BV .726 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=4.56, mean=11.52, max.=18.34) deg.
U-B UB .419 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=4.56, mean=11.52, max.=18.34) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Cgh   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)

38 Leda          Discovered 1856-Jan-12 by Chacornac, J. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 QO2 = A904 SF 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Sep-02 18:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin