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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1091233355474261 4.8607e-08  
a 2.357454958742094 1.0404e-08 AU
q 2.100201610241337 1.1526e-07 AU
i 4.070180947728125 5.2702e-06 deg
node 81.760713465056 7.4782e-05 deg
peri 97.47737941595197 7.8294e-05 deg
M 268.865015625615 2.526e-05 deg
tp 2457135.192634784064
(2015-Apr-22.69263478)
9.351e-05 JED
period 1322.097648333263
3.62
8.7522e-06
2.396e-08
d
yr
n .2722945619439255 1.8026e-09 deg/d
Q 2.614708307242851 1.1539e-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 = 1.10845 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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