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465 Alekto (A901 AC)
Classification: Main-belt Asteroid          SPK-ID: 2000465
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 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2057618962411084 3.0014e-08  
a 3.094725713577748 1.0279e-08 au
q 2.457949082405873 9.4072e-08 au
i 4.648662827865488 3.4546e-06 deg
node 300.5729361755929 4.1991e-05 deg
peri 284.0687912533771 4.2761e-05 deg
M 297.6926008486524 9.7438e-06 deg
tp 2459544.666657824082
(2021-Nov-26.16665782)
5.466e-05 TDB
period 1988.527823408432
5.44
9.9072e-06
2.712e-08
d
yr
n .1810384525487518 9.0196e-10 deg/d
Q 3.731502344749623 1.2394e-08 au
  Orbit Determination Parameters
   # obs. used (total)      4556  
   data-arc span      43841 days (120.03 yr)  
   first obs. used      1901-01-13  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39046  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:46:53  

Additional Information
 Earth MOID = 1.45294 au 
 Jupiter MOID = 1.32247 au 
 T_jup = 3.186 
[ 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 9.83   n/a E2021B10  
diameter diameter 73.34 km 2.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 10.936 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2013) Minor Planet Bull. 40, 33.]
[Pilcher, F. (2015) Minor Planet Bull. 42, 91-94.]
[Pilcher, F. (2016) Minor Planet Bull. 43, 296-299.]
geometric albedo albedo 0.0433   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17

465 Alekto (A901 AC)          Discovered 1901-Jan-13 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A901 AC = 1949 YE1 = 1949 YU = 1968 PB = A907 EF = A916 YC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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