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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543766679490436 3.3391e-08  
a 2.696542034206725 8.3327e-09 au
q 2.280258859981355 9.1447e-08 au
i 6.092111950579802 3.699e-06 deg
node 296.2795179107522 3.6929e-05 deg
peri 296.670649114334 3.9246e-05 deg
M 329.8439406611431 1.3306e-05 deg
tp 2459135.981908909917
(2020-Oct-13.48190891)
5.9884e-05 TDB
period 1617.369387011517
4.43
7.4969e-06
2.053e-08
d
yr
n .2225836614016711 1.0317e-09 deg/d
Q 3.112825208432096 9.6191e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3202  
   data-arc span      31685 days (86.75 yr)  
   first obs. used      1933-09-16  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40427  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:31:41  

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

[ 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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