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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1096037113880394 3.0749e-08  
a 2.35681524252726 5.5519e-09 au
q 2.09849954489037 7.1643e-08 au
i 4.068036897759541 2.7971e-06 deg
node 81.71805064846512 4.5799e-05 deg
peri 97.43598811265525 4.7557e-05 deg
M 202.2739353290733 1.4069e-05 deg
tp 2459779.512182104611
(2022-Jul-19.01218210)		 5.2366e-05 TDB
period 1321.559540539796
3.62		 4.6698e-06
1.279e-08		 d
yr
n .272405433850492 9.6256e-10 deg/d
Q 2.61513094016415 6.1605e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3276  
   data-arc span      33930 days (92.90 yr)  
   first obs. used      1928-02-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:56:01  

Additional Information
 Earth MOID = 1.10587 au 
 Jupiter MOID = 2.3482 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457086.5 (2015-Mar-05.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088738655285059 3.0765e-08  
q 2.101205788294882 7.1662e-08 au
tp 2457134.556171265209
(2015-Apr-22.05617127)		 5.0107e-05 TDB
node 81.74603933645109 4.577e-05 deg
peri 97.25530927666846 4.7555e-05 deg
i 4.06888997283981 2.7979e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3276  
   data-arc span      33930 days (92.90 yr)  
   first obs. used      1928-02-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:56:01  

Additional Information
 Jupiter MOID = 2.3482 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.464560049079042E-16 -2.199541957850204E-15 2.650994979257895E-13 -2.690223565355066E-16 7.131734197681069E-14 4.138024308496544E-16
q -2.199541957850204E-15 5.135434197006928E-15 -5.723579484514985E-13 6.853584260789387E-16 -1.553851404018659E-13 -9.366064520042637E-16
tp 2.650994979257895E-13 -5.723579484514985E-13 2.510700938820888E-9 -1.817976224920787E-12 6.588809998189093E-10 2.727114629958467E-13
node -2.690223565355066E-16 6.853584260789387E-16 -1.817976224920787E-12 2.094919934235091E-9 -2.08986824568899E-9 -2.286999229773952E-11
peri 7.131734197681069E-14 -1.553851404018659E-13 6.588809998189093E-10 -2.08986824568899E-9 2.26147175625553E-9 2.288627678365006E-11
i 4.138024308496544E-16 -9.366064520042637E-16 2.727114629958467E-13 -2.286999229773952E-11 2.288627678365006E-11 7.828031470042365E-12

[ 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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