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1568 Aisleen (1946 QB)
Classification: Main-belt Asteroid          SPK-ID: 2001568
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2544909389674231 1.2343e-08  
a 2.351684943307616 6.232e-09 au
q 1.753202433929709 2.8109e-08 au
i 24.87321968620607 7.5585e-07 deg
node 146.1415783129524 2.2532e-06 deg
peri 229.1160015127153 5.521e-06 deg
M 189.5342969387412 4.5918e-06 deg
tp 2459824.237202359918
(2022-Sep-01.73720236)
1.8139e-05 TDB
period 1317.246747100074
3.61
5.2361e-06
1.434e-08
d
yr
n .2732973156263562 1.0864e-09 deg/d
Q 2.950167452685522 7.818e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2834  
   data-arc span      27244 days (74.59 yr)  
   first obs. used      1946-08-21  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:35:04  

Additional Information
 Earth MOID = .812827 au 
 Jupiter MOID = 2.64535 au 
 T_jup = 3.392 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.81   n/a E2021B10  
diameter diameter 12.448 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.6746 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Malcolm, G. (2001) Minor Planet Bull. 28, 64.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Warner, Brian D. (2014) Minor Planet Bull. 41, 235-241.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.165   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1568 Aisleen (1946 QB)          Discovered 1946-Aug-21 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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