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 ]  
1511 Dalera (1939 FB)
Classification: Main-belt Asteroid          SPK-ID: 2001511
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1090085647642749 4.8452e-08  
a 2.358178276765078 9.3216e-09 AU
q 2.101116647356625 1.1515e-07 AU
i 4.069124086229755 4.8225e-06 deg
node 81.75326900025759 7.2969e-05 deg
peri 97.27527888878109 7.5834e-05 deg
M 323.494508929592 2.1458e-05 deg
tp 2457134.627883811781
(2015-Apr-22.12788381)
7.8948e-05 JED
period 1322.706167110914
3.62
7.8428e-06
2.147e-08
d
yr
n .2721692912238555 1.6138e-09 deg/d
Q 2.61523990617353 1.0338e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1530  
   data-arc span      31778 days (87.00 yr)  
   first obs. used      1928-02-24  
   last obs. used      2015-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43639  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:36:15  

Additional Information
 Earth MOID = 1.11012 AU 
 T_jup = 3.542 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.70 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
diameter diameter 15.47 km 3.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
geometric albedo albedo 0.0614   0.037 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3

1511 Dalera (1939 FB)          Discovered 1939-Mar-22 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1939 FB = 1928 DB = 1954 LM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-30 09:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin