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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 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2057618703061339 2.1381e-08  
a 3.094725728442804 8.74e-09 au
q 2.4579491744739 6.8137e-08 au
i 4.648662648537075 1.4388e-06 deg
node 300.5729240672022 1.2854e-05 deg
peri 284.0688180409799 1.5804e-05 deg
M 297.6925814596111 4.8557e-06 deg
tp 2459544.666767402836
(2021-Nov-26.16676740)
2.7178e-05 TDB
period 1988.52783773583
5.44
8.4239e-06
2.306e-08
d
yr
n .1810384512443647 7.6692e-10 deg/d
Q 3.731502282411708 1.0538e-08 au
  Orbit Determination Parameters
   # obs. used (total)      4744  
   data-arc span      43896 days (120.18 yr)  
   first obs. used      1901-01-13  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:26:36  

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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