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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1093936744152557 3.0855e-08  
a 2.357295739813484 6.192e-09 au
q 2.099422497151858 7.204e-08 au
i 4.068056551072984 3.5909e-06 deg
node 81.72152675907299 4.6289e-05 deg
peri 97.50620680455614 4.9029e-05 deg
M 147.7122174395005 1.5993e-05 deg
tp 2458458.082802060352
(2018-Dec-05.58280206)
5.8675e-05 TDB
period 1321.963711893035
3.62
5.2087e-06
1.426e-08
d
yr
n .2723221498149028 1.073e-09 deg/d
Q 2.615168982475109 6.8694e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2702  
   data-arc span      33415 days (91.49 yr)  
   first obs. used      1928-02-24  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41723  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:18:16  

Additional Information
 Earth MOID = 1.10726 au 
 Jupiter MOID = 2.34915 au 
 T_jup = 3.542 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO337257  
diameter diameter 13.515 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 3.880 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Salvaggio, F.; Marchini, A.; Franco, L. (2015) Minor Planet Bull. 42, 226-227.]
[Scardella, M.; Franceschini, F.; Tomassini, A. (2015) Minor Planet Bull. 42, 216.]
[Casalnuovo, G.B. (2016) Minor Planet Bull. 43, 112-115.]
geometric albedo albedo 0.080   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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