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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 ]

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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543766715271065 3.4826e-08  
a 2.696542035326314 9.2747e-09 au
q 2.280258851279708 9.4353e-08 au
i 6.092114222373937 4.0611e-06 deg
node 296.2795095476063 3.7707e-05 deg
peri 296.6706578193525 4.0038e-05 deg
M 329.843939651073 1.4232e-05 deg
tp 2459135.981913532228
(2020-Oct-13.48191353)
6.4151e-05 TDB
period 1617.369388018801
4.43
8.3444e-06
2.285e-08
d
yr
n .222583661263048 1.1484e-09 deg/d
Q 3.112825219372919 1.0707e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2931  
   data-arc span      31551 days (86.38 yr)  
   first obs. used      1933-09-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:55:14  

Additional Information
 Earth MOID = 1.27695 au 
 Jupiter MOID = 1.94026 au 
 T_jup = 3.344 
[ show covariance matrix ]

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 10.8   n/a MPO337257  
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 31.8 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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

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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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