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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1090085613129168 4.8632e-08  
a 2.358178274789962 1.0574e-08 AU
q 2.101116653735732 1.1533e-07 AU
i 4.069120940170402 5.2683e-06 deg
node 81.75329294273506 7.4814e-05 deg
peri 97.27525168200037 7.8329e-05 deg
M 323.4945137971497 2.5376e-05 deg
tp 2457134.627865758969
(2015-Apr-22.12786576)
9.3552e-05 JED
period 1322.706165449146
3.62
8.8963e-06
2.436e-08
d
yr
n .2721692915657926 1.8306e-09 deg/d
Q 2.615239895844192 1.1726e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1447  
   data-arc span      31418 days (86.02 yr)  
   first obs. used      1928-02-24  
   last obs. used      2014-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44231  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:59:33  

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 ]
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