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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1090085638010614 4.8436e-08  
a 2.358178271357658 8.9479e-09 AU
q 2.10111664481009 1.1514e-07 AU
i 4.069127216398353 4.5823e-06 deg
node 81.75325699146518 7.2747e-05 deg
peri 97.27528031484671 7.541e-05 deg
M 323.4945234418421 2.0216e-05 deg
tp 2457134.627830029764
(2015-Apr-22.12783003)
7.4313e-05 JED
period 1322.706162561368
3.62
7.5283e-06
2.061e-08
d
yr
n .272169292160002 1.5491e-09 deg/d
Q 2.615239897905226 9.9233e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1605  
   data-arc span      31808 days (87.09 yr)  
   first obs. used      1928-02-24  
   last obs. used      2015-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43241  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:05:46  

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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