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881 Athene (A917 OD)
Classification: Main-belt Asteroid          SPK-ID: 2000881
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2055895322731211 1.638e-08  
a 2.613852095331659 8.2761e-09 au
q 2.076471465621306 4.2429e-08 au
i 14.18996159037309 4.2514e-07 deg
node 277.0318732023612 8.8776e-07 deg
peri 41.35209469814748 3.4987e-06 deg
M 167.8955961289977 4.2262e-06 deg
tp 2458480.625574341575
(2018-Dec-28.12557434)
1.5918e-05 TDB
period 1543.54729493869
4.23
7.3308e-06
2.007e-08
d
yr
n .2332290051496604 1.1077e-09 deg/d
Q 3.151232725042012 9.9775e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2809  
   data-arc span      37861 days (103.66 yr)  
   first obs. used      1917-07-22  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4146  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:58:07  

Additional Information
 Earth MOID = 1.08125 au 
 Jupiter MOID = 2.17811 au 
 T_jup = 3.336 
[ 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 11.88   n/a MPCxxxxx  
diameter diameter 12.153 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.895 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.237   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

881 Athene (A917 OD)          Discovered 1917-Jul-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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