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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1086205587635548 4.8485e-08  
a 2.35735832187038 8.7025e-09 au
q 2.101300743742903 1.1507e-07 au
i 4.068956768520319 4.4396e-06 deg
node 81.73995878440839 7.2712e-05 deg
peri 97.2694256780138 7.5299e-05 deg
M 72.41515603710222 1.9599e-05 deg
tp 2457134.572164720885
(2015-Apr-22.07216472)
7.197e-05 JED
period 1322.016355960509
3.62
7.3206e-06
2.004e-08
d
yr
n .2723113056634179 1.5079e-09 deg/d
Q 2.613415899997856 9.6477e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1685  
   data-arc span      31891 days (87.31 yr)  
   first obs. used      1928-02-24  
   last obs. used      2015-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .42564  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:39:14  

Additional Information
 Earth MOID = 1.10916 au 
 Jupiter MOID = 2.35368 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 12.8 mag n/a MPO337257  
diameter diameter 15.47 km 3.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 3.880 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Published Reference List:
[Scardella, M.; Franceschini, F.; Tomassini, A. (2015) Minor Planet Bul. 42, 216.]
[Salvaggio, F.; Marchini, A.; Franco, L. (2015) Minor Planet Bul. 42, 226-227.]
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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