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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1096037100521228 1.0822e-08  
a 2.356815242723064 5.3747e-09 au
q 2.098499548213222 2.4924e-08 au
i 4.068042821409309 5.6321e-07 deg
node 81.71803101611555 8.1157e-06 deg
peri 97.43600928721618 9.856e-06 deg
M 202.2739362940531 5.1389e-06 deg
tp 2459779.512178634328
(2022-Jul-19.01217863)
1.984e-05 TDB
period 1321.559540704489
3.62
4.5207e-06
1.238e-08
d
yr
n .2724054338165448 9.3183e-10 deg/d
Q 2.615130937232906 5.9638e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3349  
   data-arc span      33956 days (92.97 yr)  
   first obs. used      1928-02-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:33:28  

Additional Information
 Earth MOID = 1.10587 au 
 Jupiter MOID = 2.3482 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088164696638256 1.0814e-08  
q 2.101209728672035 2.4906e-08 au
tp 2457134.548008746353
(2015-Apr-22.04800875)
1.7026e-05 TDB
node 81.74380744788797 8.111e-06 deg
peri 97.25447089978195 9.8709e-06 deg
i 4.068886464822975 5.6323e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3349  
   data-arc span      33956 days (92.97 yr)  
   first obs. used      1928-02-24  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39343  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:33:28  

Additional Information
 Jupiter MOID = 2.3482 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.169521600623441E-16 -2.645273935039065E-16 -9.19226050862577E-14 -1.933144711035429E-14 -9.34967743121493E-15 1.120593697127262E-15
q -2.645273935039065E-16 6.203296827350404E-16 2.236139089367889E-13 4.560628862030444E-14 2.425266165288698E-14 -2.652409926260476E-15
tp -9.19226050862577E-14 2.236139089367889E-13 2.898748688977582E-10 -8.379790227337674E-12 9.796317621430106E-11 -1.48593762225558E-12
node -1.933144711035429E-14 4.560628862030444E-14 -8.379790227337674E-12 6.578830119592854E-11 -6.758853968015789E-11 3.11100278346085E-13
peri -9.34967743121493E-15 2.425266165288698E-14 9.796317621430106E-11 -6.758853968015789E-11 9.743373698231289E-11 -7.086234292109128E-13
i 1.120593697127262E-15 -2.652409926260476E-15 -1.48593762225558E-12 3.11100278346085E-13 -7.086234292109128E-13 3.172290335195849E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.86   n/a E2021B10  
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. 2020-October); 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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