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1457 Ankara (1937 PA)
Classification: Main-belt Asteroid          SPK-ID: 2001457
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1548948126497873 2.2882e-08  
a 2.698370820930694 7.4361e-09 au
q 2.280407178162982 6.2667e-08 au
i 6.090595942791526 4.6979e-07 deg
node 296.2803201860432 1.8786e-06 deg
peri 296.835216018365 5.24e-06 deg
M 57.79874936303702 3.6618e-06 deg
tp 2459136.563770293755
(2020-Oct-14.06377029)
1.6221e-05 TDB
period 1619.015008551238
4.43
6.6924e-06
1.832e-08
d
yr
n .2223574198500748 9.1915e-10 deg/d
Q 3.116334463698407 8.5879e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      32104 days (87.90 yr)  
   first obs. used      1933-09-16  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39171  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:44:12  

Additional Information
 Earth MOID = 1.27742 au 
 Jupiter MOID = 1.93488 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456696.5 (2014-Feb-08.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .156204742468734 2.281e-08  
q 2.274349443582229 6.2548e-08 au
tp 2455899.931843444572
(2011-Dec-04.43184344)
1.8944e-05 TDB
node 296.3430181014248 1.8766e-06 deg
peri 296.4767927532279 5.274e-06 deg
i 6.097801997580134 4.7044e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3539  
   data-arc span      32104 days (87.90 yr)  
   first obs. used      1933-09-16  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39171  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:44:12  

Additional Information
 Jupiter MOID = 1.93488 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.203142845287546E-16 -1.41947358648267E-15 2.459114688247672E-13 -1.375648112723938E-14 1.039671513751743E-13 6.193336124839886E-15
q -1.41947358648267E-15 3.912205658140603E-15 -7.289760749124637E-13 3.730465256013101E-14 -2.890408579547771E-13 -1.697934347650204E-14
tp 2.459114688247672E-13 -7.289760749124637E-13 3.58886400012452E-10 2.844450632628588E-13 8.42300421404147E-11 3.510398726554874E-12
node -1.375648112723938E-14 3.730465256013101E-14 2.844450632628588E-13 3.521694479864617E-12 -3.660637431530593E-12 -2.606342048237954E-13
peri 1.039671513751743E-13 -2.890408579547771E-13 8.42300421404147E-11 -3.660637431530593E-12 2.781537933444777E-11 1.483667214010928E-12
i 6.193336124839886E-15 -1.697934347650204E-14 3.510398726554874E-12 -2.606342048237954E-13 1.483667214010928E-12 2.213153933995265E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.85   n/a MPO636083  
diameter diameter 17.834 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 35.54 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
geometric albedo albedo 0.320   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1457 Ankara (1937 PA)          Discovered 1937-Aug-03 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1937 PA = 1933 SA = 1934 XG = 1936 FL1 = 1943 YD = 1966 BG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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