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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1544209195769252 3.3399e-08  
a 2.696634076801971 8.1908e-09 au
q 2.280217362899738 9.1416e-08 au
i 6.092092006065774 3.6788e-06 deg
node 296.2792657965202 3.6921e-05 deg
peri 296.7123720761737 3.9227e-05 deg
M 14.32951566134418 1.3277e-05 deg
tp 2459136.118592786352
(2020-Oct-13.61859279)
5.9605e-05 TDB
period 1617.452197595014
4.43
7.3693e-06
2.018e-08
d
yr
n .2225722655267854 1.0141e-09 deg/d
Q 3.113050790704205 9.4556e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3255  
   data-arc span      31768 days (86.98 yr)  
   first obs. used      1933-09-16  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40322  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:18:47  

Additional Information
 Earth MOID = 1.27557 au 
 Jupiter MOID = 1.939 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 10.86   n/a E2021B10  
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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